If you install a new language module, the installation process adds a language_name subdirectory containing message files in the new language.
Message file names sometimes vary by platform, but most resemble the following names:
cslib.loc – CS-Library messages
ctlib.loc – Client-Library messages
oslib.loc – Server-Library messages
blklib.loc – Bulk Library messages
bcp.loc – Bulk Copy messages
esql.loc – Embedded SQL messages
