Document:

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                                                                 Exhibit 10.46

                      LOAN DOCUMENT MODIFICATION AGREEMENT
                     Number 6; dated as of December 20, 1999

      LOAN DOCUMENT MODIFICATION AGREEMENT dated as of December 20, 1999 (this
"Agreement") by and among SILICON VALLEY BANK (the "Bank"), a
California-chartered bank with its principal place of business located at 3003
Tasman Drive, Santa Clara, California 95054, and with a loan production office
located at 40 William Street, Wellesley, Massachusetts 02481, doing business
under the name "Silicon Valley East," LIONBRIDGE TECHNOLOGIES HOLDINGS B.V., a
company with limited liability, incorporated in the Netherlands and having a
principal place of business located at The Sinus Building, Overschiestraat 55,
1062 HN, Amsterdam, The Netherlands, LIONBRIDGE TECHNOLOGIES B.V., a company
with limited liability, incorporated in Netherlands and having a principal place
of business located at the same address (each a "Borrower" and collectively, the
"Borrowers") and LIONBRIDGE TECHNOLOGIES, INC., a Delaware company with its
principal place of business located at 950 Winter Street, Suite 2410, Waltham,
Massachusetts 02451 (the "Parent Guarantor").

      1. Reference to Existing Loan Documents.

      Reference is hereby made to that Loan Agreement dated as of September 26,
1997 among the Bank and the Borrowers, as amended by Loan Documentation
Modification Agreement No. 1 dated as of May 21, 1998, as further amended by
Loan Document Modification Agreement No. 2 dated as of February 25, 1999, Loan
Document Modification Agreement No. 3 dated as of May 20, 1999, Loan Document
Modification Agreement No. 4 dated as of July 16, 1999 and Loan Document
Modification Agreement No. 5 dated as of September 20, 1999 (with the attached
schedules and exhibits, and as the same may hereafter be further amended,
modified, supplemented, extended or restated from time to time, the "Loan
Agreement") and the Loan Documents referred to therein, including without
limitation that certain Amended and Restated Promissory Note of the Borrowers
dated as of September 20, 1999 in the principal amount of $8,000,000 (the
"Amended Note") and the Security Documents referred to therein, and also
including that certain Amended and Restated Guarantee of the Parent Guarantor
dated as of May 21, 1998 in favor of the Bank (the "Parent Guarantee"). Unless
otherwise defined herein, capitalized terms used in this Agreement shall have
the same respective meanings as set forth in the Loan Agreement.

      2. Effective Date.

      This Agreement shall become effective as of December 20, 1999 (the
"Effective Date"), provided that the Bank shall have received the following on
or before December 29, 1999 and provided further, however, in no event shall
this Agreement become effective until signed by an officer of the Bank in
California:

            a. two copies of this Agreement, duly executed by each Borrower and
the Parent Guarantor;

            b. an amended and restated promissory note in the form enclosed
herewith (the "Amended Note"), duly executed by the Borrowers;

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                                       -2-

            c. the attached consents of affiliated entities who have previously
furnished guaranties in favor of the Bank of the obligations of the Borrowers,
duly executed by officers thereof

            d. payment of the Bank's facility fee specified below; and

            e. such other documents, and completion of such other matters, as
the Bank may reasonably request in connection with the amendment of the Loan
Agreement, as contemplated hereunder.

      By the signature of its authorized officer below, the Borrowers are hereby
representing that, except as modified in Schedule A attached hereto, the
representations of the Borrowers set forth in the Loan Documents (including
those contained in the Loan Agreement, as amended by this Agreement) are true
and correct as of the Effective Date as if made on and as of such date. In
addition, the Borrowers confirm their authorization as to the debiting of their
account with the Bank in the amount of $ 10,000 in order to pay the Bank's
facility fee for the period up to and including the extended Revolving Maturity
Date. Finally, the Borrowers (and each guarantor signing below) agree that, as
of the Effective Date, they have no defenses against their obligations to pay
any amounts under the Loan Agreement and the other Loan Documents.

      3. Description of Change in Terms.

      As of the Effective Date, the Loan Agreement and the Parent Guarantee are
modified in the following respects:

            a. Section 1.1 of the Loan Agreement is hereby amended by restating
the definition of "Revolving Maturity Date" in its entirety as follows:

            "'Revolving Maturity Date' means March 20, 2000."

            b. Section 13(c) of the Parent Guarantee is hereby amended by (i)
decreasing the minimum EBITDA requirement for the fiscal quarter ended December
31, 1999 from ($1,000,000) to ($1,750,000) and (ii) setting the minimum EBITDA
requirement for the fiscal quarter ended March 31, 2000 at ($1,000,000).

            c. The Compliance Certificate attached to the Parent Guarantee is
amended by restating in its entirety Exhibit A thereto in the form of Exhibit A
hereto.

            d. The Loan Agreement and the other Loan Documents are hereby
amended wherever necessary or appropriate to reflect the foregoing changes.

      4. Continuing Validity.

      Upon the effectiveness hereof, each reference in each Security Instrument
or other Loan Document to (i) "the Loan Agreement," "thereunder," "thereof,"
"therein" or words of like import referring to the Loan Agreement, shall mean
and be a reference to the Loan Agreement, as amended hereby and (ii) "the Parent
Guarantee," "thereunder," "thereof," "therein" or words of like import referring
to the Parent Guarantee, shall mean and be a reference to the Parent

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                                       -3-

Guarantee, as amended hereby. Except as specifically set forth above, the Loan
Agreement shall remain in full force and effect and is hereby ratified and
confirmed.

      Each of the other Loan Documents is in full force and effect and is hereby
ratified and confirmed. The amendments and limited waiver set forth above (i) do
not constitute a waiver or modification of any term, condition or covenant of
the Loan Agreement or any other Loan Document, other than as expressly set forth
herein, and (ii) shall not prejudice any rights which the Bank may now or
hereafter have under or in connection with the Loan Agreement, as modified
hereby, or the other Loan Documents, and shall not obligate the Bank to assent
to any further modifications.

      5. Miscellaneous.

            a. This Agreement may be signed in one or more counterparts each of
which taken together shall constitute one and the same document.

            b. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE COMMONWEALTH OF MASSACHUSETTS.

            c. THE BORROWERS ACCEPT FOR THEMSELVES AND IN CONNECTION WITH THEIR
PROPERTIES, UNCONDITIONALLY, THE NON-EXCLUSIVE JURISDICTION OF ANY STATE OR
FEDERAL COURT OF COMPETENT JURISDICTION IN THE COMMONWEALTH OF MASSACHUSETTS IN
ANY ACTION, SUIT, OR PROCEEDING OF ANY KIND AGAINST THEM WHICH ARISES OUT OF OR
BY REASON OF THIS AGREEMENT; PROVIDED, HOWEVER, THAT IF FOR ANY REASON THE BANK
CANNOT AVAIL ITSELF OF THE COURTS OF THE COMMONWEALTH OF MASSACHUSETTS, THEN
VENUE SHALL LIE IN SANTA CLARA COUNTY, CALIFORNIA.

            d. The Borrowers agree to promptly pay on demand all costs and
expenses of the Bank in connection with the preparation, reproduction, execution
and delivery of this Agreement and the other instruments and documents to be
delivered hereunder, including the reasonable fees and out-of-pocket expenses of
Sullivan & Worcester LLP, special counsel for the Bank with respect thereto.

                  [Remainder of page intentionally left blank.]

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                                       -4-

      IN WITNESS WHEREOF, the Bank and the Borrowers have caused this Agreement
to be signed under seal by their respective duly authorized officers as of the
date set forth above.

                                   Sincerely,

                                   SILICON VALLEY EAST, a Division
                                     of Silicon Valley Bank

                                   By:
                                       ---------------------------------------
                                             Andrew H. Tsao
                                             Senior Vice President

                                   SILICON VALLEY BANK

                                   By:
                                       ---------------------------------------
                                             Name:
                                             Title:
                                             (signed in Santa Clara, CA)

                                   BORROWERS:

                                   LIONBRIDGE TECHNOLOGIES HOLDINGS B.V.

                                   By: /s/ Rory J. Cowan
                                       ---------------------------------------
                                             Rory J. Cowan
                                             Managing Director

                                   LIONBRIDGE TECHNOLOGIES B.V.

                                   By: /s/ Rory J. Cowan
                                       ---------------------------------------
                                             Rory J. Cowan
                                             Managing Director

                                   PARENT GUARANTOR:

                                   LIONBRIDGE TECHNOLOGIES, INC.

                                   By: /s/ Rory J. Cowan
                                       ---------------------------------------
                                             Rory J. Cowan
                                             Title:<PAGE>

                                                                Exhibit 10.47

                                     FORM OF

                      AMENDED AND RESTATED PROMISSORY NOTE

$8,000,000                                               Boston, Massachusetts
                                                         As of December 20, 1999

      FOR VALUE RECEIVED, the undersigned (the "Borrowers"), jointly and
severally, absolutely and unconditionally promise to pay to the order of Silicon
Valley Bank ("Payee") at the head office of Payee at 3003 Tasman Drive, Santa
Clara, California 95054:

            (a) on March 20, 2000, the principal amount of EIGHT MILLION DOLLARS
($8,000,000) or, if less, the aggregate unpaid principal amount of Advances made
by the Payee to the Borrowers pursuant to the Loan Agreement dated as of
September 26, 1997, as amended May 21, 1998, February 25, 1999, May 20, 1999,
September 20, 1999 and December 20, 1999 and as may be further amended or
supplemented from time to time (the "Loan Agreement"), by and among the
Borrowers and the Payee; and

            (b) interest on the principal balance hereof from time to time
outstanding from the date hereof through and including the date on which such
principal amount is paid in full, at the times and at the rates provided in the
Loan Agreement.

      This Note constitutes an amendment and restatement in its entirety of the
Amended and Restated Promissory Note payable to the Payee in the original
principal amount of $8,000,000 dated September 20, 1999, (the "Preceding Note")
and is in substitution therefor and a replacement thereof. Nothing herein or in
any other document shall be construed to constitute payment of the Preceding
Note or to release or terminate the security interest created by any Security
Documents in favor of the Payee in respect of the obligations of the Borrowers,
thereunder.

      This Note evidences borrowings under, is subject to the terms and
conditions of and has been issued by the Borrowers in accordance with the terms
of, the Loan Agreement. The Payee and any holder hereof is entitled to the
benefits and subject to the conditions of the Loan Agreement and may enforce the
agreements of the Borrowers contained therein, and any holder hereof may
exercise the respective remedies provided for thereby or otherwise available in
respect thereof, all in accordance with the respective terms thereof. This Note
is secured by the Security Documents described in the Loan Agreement.

      All capitalized terms used in this Note and not otherwise defined herein
shall have the same meanings herein as in the Loan Agreement.

      This Note may be prepaid at any time, without premium or penalty, in whole
or in part. Any prepayment of principal shall be accompanied by a payment of
accrued interest in respect of the principal being prepaid.

      If any Event of Default shall occur and be continuing, the Payee may
declare any or all obligations or liabilities of the Borrowers to the Payee
(including the unpaid principal hereunder

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and any interest due thereon) immediately due and payable without presentment,
demand, protest or notice.

      The Borrowers and every endorser and guarantor of this Note or the
obligation represented hereby waive presentment, demand, notice, protest and all
other demands and notice in connection with the delivery, acceptance,
performance, default or enforcement of this Note, assent to any extension or
postponement of the time of payment or any other indulgence, to any
substitution, exchange or release of collateral and to the addition or release
of any other party or person primarily or secondarily liable.

      This Note shall be governed by, and construed in accordance with, the
internal laws of The Commonwealth of Massachusetts, without regard to principles
of conflicts of law. Each of the Borrowers hereby submits to the exclusive
jurisdiction of the state and Federal courts located in The Commonwealth of
Massachusetts and in the County of Santa Clara, State of California in
connection with any suit under or in connection with this Note. The Borrowers
irrevocably waive any objection which they may now or hereafter have to the
laying of venue of any such action brought in the courts referred to in the
preceding sentence and irrevocably waive and agree not to plead or claim in any
such action that such action has been brought in an inconvenient forum. THE
BORROWERS HEREBY WAIVE THEIR RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR
CAUSE OF ACTION BASED UPON OR ARISING OUT OF ANY OF THE LOAN DOCUMENTS OR ANY OF
THE TRANSACTIONS CONTEMPLATED THEREIN, INCLUDING CONTRACT CLAIMS, TORT CLAIMS,
BREACH OF DUTY CLAIMS, AND ALL OTHER COMMON LAW OR STATUTORY CLAIMS. EACH
BORROWER RECOGNIZES AND AGREES THAT THE FOREGOING WAIVE CONSTITUTES A MATERIAL
INDUCEMENT FOR IT TO ENTER INTO THIS AGREEMENT. EACH BORROWER REPRESENTS AND
WARRANTS THAT IS HAS REVIEWED THIS WAIVER WITH ITS LEGAL COUNSEL AND THAT IT
KNOWINGLY AND VOLUNTARILY WAIVES ITS JURY TRIAL RIGHTS FOLLOWING CONSULTATION
WITH LEGAL COUNSEL.

      This Note shall be deemed to take effect as a sealed instrument under the
laws of The Commonwealth of Massachusetts and for all purposes shall be
construed in accordance with such laws (without regard to conflicts of laws
rules).

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      IN WITNESS WHEREOF, the Borrowers have caused this Note to be signed under
seal by their duly authorized officers as of the day and year first above
written.

                                   BORROWERS:

                                   LIONBRIDGE TECHNOLOGIES
                                       HOLDINGS B.V.

                                   By: /s/ Rory J. Cowan
                                       ---------------------------------------
                                             Rory J. Cowan
                                             Managing Director

                                   LIONBRIDGE TECHNOLOGIES B.V.

                                   By: /s/ Rory J. Cowan
                                       ---------------------------------------
                                             Rory J. Cowan
                                             Managing Director

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