musescore/MuseScore — pull request #1038 by ChurchOrganist (2014-07-15 13:18:58+00:00)
Title: Add Balalaika Family to Instrument List

A response to this thread http://musescore.org/en/node/27581 but the balalaika family was also asked for in 2012: http://musescore.org/en/node/15908. A little digging this morning enabled me to find the requisite string data. Not sure I have the clefs correct though these are pure speculation in the absence of information from the web