Document:

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                                                                   Exhibit 10.49

                                    AMENDMENT

     Pursuant to the terms of the First Amended and Restated Senior Subordinated
Note Purchase Agreement dated as of February 26, 1999 between Lionbridge
Technologies Holdings, Inc. ("LTBV") and Capital Resource Lenders III, L.P.
("CRL III"), as amended (the "LTBV Purchase Agreement"), the undersigned hereby
amend the LTBV Purchase Agreement by (i) deleting Sections 7.01(n) and (o) in
their entirety; and (ii) LTBV covenants to CRL III that it will abide by and be
in compliance with the financial covenants set forth in its commercial lending
agreements with Silicon Valley Bank, as such covenants may from time to time be
amended. In addition, CRL III hereby irrevocably waive its rights under Article
VIII of the LTBV Purchase Agreement with respect to any violation by LTBV of the
covenants set forth in such Sections 7.01(n) and (o).

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed by their respective officers or duly authorized representatives as of
the 31st day of December, 2001.

                                CAPITAL RESOURCE LENDERS III, L.P.

                                By:  Capital Resource Partners III, L.L.C.
                                     Its General Partner

                                By:  /s/ Stephen Jenks
                                     Member

                                LIONBRIDGE TECHNOLOGIES HOLDINGS B.V.

                                By:  /s/ Stephen J. Lifshatz<PAGE>

                                                                   Exhibit 10.50

                                    AMENDMENT

     Lionbridge Technologies Holdings B.V. ("LTBV") and Morgan Stanley Venture
Capital Fund II Annex, L.P. and Morgan Stanley Venture Investors Annex, L.P.,
(collectively, "Morgan"), amend the Senior Subordinated Promissory Note issued
by LBTV to Morgan on March 9, 1999 by changing the payment date reflected
therein to April 15, 2002.

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed by their respective officers or duly authorized representatives as of
the 31st day of December, 2001.

                                MORGAN STANLEY VENTURE CAPITAL FUND II ANNEX,
                                L.P.

                                By:  Morgan Stanley Venture Partners II, L.P.,
                                its General Partner

                                By:  Morgan Stanley Venture Capital II, Inc.,
                                its Managing General Partner

                                By:  /s/ Debra Abramovitz
                                     ---------------------------------------

                                MORGAN STANLEY VENTURE INVESTORS ANNEX, L.P.

                                By:  Morgan Stanley Venture Partners II, L.P.,
                                its General Partner

                                By:  Morgan Stanley Venture Capital II, Inc.,
                                its Managing General Partner

                                By:  /s/ Debra Abramovitz
                                     ---------------------------------------

                                LIONBRIDGE TECHNOLOGIES HOLDINGS B.V.

                                By:  /s/ Stephen J. Lifshatz
                                     ---------------------------------------<PAGE>

                                                                   Exhibit 10.51

                                    AMENDMENT

     Lionbridge Technologies Holding, Inc. ("LTHI") and Morgan Stanley Venture
Capital Fund II Annex, L.P. and Morgan Stanley Venture Investors Annex, L.P.,
(collectively, ("Morgan"), amend the Senior Subordinated Promissory Note issued
by LTBV to Morgan on March 9, 1999 by changing the payment date reflected
therein to April 15, 2002.

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed by their respective officers or duly authorized representatives as of
the 31st day of December, 2001.

                                MORGAN STANLEY VENTURE CAPITAL FUND II ANNEX,
                                L.P.

                                By:  Morgan Stanley Venture Partners II, L.P.,
                                its General Partner

                                By:  Morgan Stanley Venture Capital II, Inc.,
                                its Managing General Partner

                                By:  /s/ Debra Abramovitz
                                     ---------------------------------------

                                MORGAN STANLEY VENTURE INVESTORS ANNEX, L.P.

                                By:  Morgan Stanley Venture Partners II, L.P.,
                                its General Partner

                                By:  Morgan Stanley Venture Capital II, Inc.,
                                its Managing General Partner

                                By:  /s/ Debra Abramovitz
                                     ---------------------------------------

                                LIONBRIDGE TECHNOLOGIES HOLDINGS, INC.

                                By:  /s/ Stephen J. Lifshatz
                                     ---------------------------------------<PAGE>

                                                                   Exhibit 10.52

                            FIRST AMENDMENT TO LEASE
                            ------------------------

This FIRST AMENDMENT TO LEASE ("Amendment") is dated as of February 28, 2002 by
and between MISSION STREET DEVELOPMENT LLC, successor in interest to WTR
PROPERTIES, INC., pursuant to that certain Assignment of Leases dated as of June
29, 2001, as "Lessor" and INT'L.COM,INC., as successor by merger to DIRECT
LANGUAGE COMMUNICATIONS, as "Lessee," amending and supplementing the lease dated
as of February 19, 1997 between the parties' predecessors in interest (the
"Lease").

WHEREAS, Lessor intents to redevelop the real property located at 301 Mission
Street, San Francisco, California, and has informed Lessee of its intent to
commence the redevelopment in calendar year 2002 (the "Redevelopment Work");

WHEREAS, the Lease expires by its terms on February 28, 2002;

WHEREAS, Lessee, as successor in interest to IC Global Services, Inc., has
previously entered into a lease with Lessor dated November 2, 1998 for certain
space at 124 Beale Street, San Francisco, California, which Lessee now desires
to allow to expire by its terms;

WHEREAS, Lessee now desires to extend its tenancy of its spaces in the Building
pursuant to the terms of the Lease, and Lessor and Lessee desire to amend
certain provisions of the Lease on the terms and conditions contained herein.

NOW THEREFORE, for good and valuable consideration paid by Lessee to Lessor and
in consideration of the agreements between the parties hereto, the parties agree
as follows:

1. Effective Date of Amendment. This Amendment shall be effective as of February
   ---------------------------
28, 2002, which shall be the "Effective Date."

2. Changes To Lease. All capitalized terms used in this section that are not
   ----------------
otherwise defined herein shall have the same meaning as in the Lease.

          (a) On and after the Effective Date, the first sentence of Paragraph 2
of the Lease shall be deleted and replaced with the following language:

               "The initial term of this Lease shall commence on March 1, 1997
     (the "Commencement Date"), and unless sooner terminated as hereinafter
     provided, shall expire on May 31, 2002 (the "Expiration Date").
     Notwithstanding the foregoing, this Lease shall be terminable by either
     party upon 30 days' written notice to the other party."

          (b) On and after the Effective Date, the final sentence of Paragraph
22 of the Lease shall be amended to read as follows:

               "Lessee understands and acknowledges that Lessor intends to
     commence redevelopment work on the real property located at 301 Mission
     Street, San Francisco, California, during calendar year 2002 (the
     "Redevelopment Work"). Lessee hereby agrees to indemnify, defend and hold
     Lessor, Lessor's predecessor in interest and any officer, director,
     shareholder, employee or agent of Lessor or Lessor's predecessor in
     interest, harmless against any claim resulting from any delay of Lessee to
     surrender the leased premises upon termination or expiration of this Lease,
     including, but not limited to, any consequential damages related to the
     Redevelopment Work."

<PAGE>

          (c) The Basic Lease Information in the Lease shall be substituted with
the BASIC LEASE INFORMATION (revised 2/28/02) attached hereto as Appendix 1 and
                                                                 ----------
made a part hereof.

          (d) On and after the Effective Date, Paragraphs 3(c)-(e) (Additional
Rent and Operating Expenses), 3(h) (Rent Abatement), 4(b) & (c) (Tax
Pass-Throughs), 8(c) (Tenant Improvement Allowance), 41 (Option to Extend), 42
(Lessee's Option to Terminate) and 43 (Right of First Offer) shall be deleted in
their entirety.

3. No Other Modifications. All prior agreements, understandings, and discussions
   ----------------------
with respect to the subject matter set forth in this Amendment are hereby
superseded by this Amendment. Except as modified by the terms of this Amendment,
all provisions of the Lease shall remain unchanged and are in full force and
effect, and shall continue to be binding on the parties hereto. Subsequent to
the Effective Date, the Lease and this Amendment shall be read as one document.

4. Governing Law. This Amendment shall be governed by, and interpreted in
   -------------
accordance with, the law of the State of California.

5. No Broker. Lessee represents and warrants that Lessee has not dealt with any
   ---------
real estate broker, sales person or finder (collectively, "Broker") representing
Lessee in connection with this Amendment, and no such person initiated or
participated in the negotiation of this Amendment on behalf of Lessee. No
commission is payable by Lessor to any Broker acting on behalf of Lessee, and
Lessee hereby agrees to indemnify and hold Lessor harmless from and against any
and all liabilities and claims for commissions and fees arising out of a breach
of Lessee's foregoing representation.

IN WITNESS WHEREOF, the parties hereto have caused this FIRST AMENDMENT TO LEASE
to be executed by their duly authorized representatives as of the respective
dates listed below.

LESSOR                                    LESSEE
MISSION STREET DEVELOPMENT LLC            LIONBRIDGE TECHNOLOGIES INC.

By: /s/Sean Jeffries                      By: /s/ Kevin Bothwell
    -----------------------------------       ------------------------------
Name:  Sean Jeffries                      Name: Kevin Bothwell
       --------------------------------         ----------------------------
Title: Authorized Representative          Title: Corporate Buyer
       --------------------------------          ---------------------------

                                          By: /s/ Stephen J. Lifshatz
                                              ------------------------------
                                          Name: Stephen J. Lifshatz
                                                ----------------------------
                                          Title: Chief Financial Officer
                                                 ---------------------------

Date:  March 13, 2002                         Date: 2/28/02
                                                    ------------------------

                                        2

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