FOR000000 - General
FOR001000 - African Languages
FOR002000 - Arabic
FOR003000 - Chinese
FOR004000 - Danish
FOR005000 - Multi-Language Dictionaries
FOR006000 - Dutch
FOR007000 - English as a Second Language
FOR008000 - French
FOR009000 - German
FOR010000 - Greek - (Modern)
FOR011000 - Hebrew
FOR012000 - Hungarian
FOR013000 - Italian
FOR014000 - Japanese
FOR015000 - Korean
FOR016000 - Latin
FOR017000 - Miscellaneous
FOR018000 - Multi-Language Phrasebooks
FOR019000 - Polish
FOR020000 - Portuguese
FOR021000 - Russian
FOR022000 - Scandinavian Languages - (Other)
FOR023000 - Serbian & Croatian
FOR024000 - Slavic Languages - (Other)
FOR025000 - Southeast Asian Languages
FOR026000 - Spanish
FOR027000 - Turkish & Turkic Languages
FOR028000 - Yiddish
FOR029000 - Celtic Languages
FOR030000 - Indic Languages
FOR031000 - Native American Languages
FOR032000 - Oceanic & Australian Languages
FOR033000 - Ancient Languages
FOR034000 - Baltic Languages
FOR035000 - Creole Languages
FOR036000 - Czech
FOR037000 - Finnish
FOR038000 - Hindi
FOR039000 - Norwegian
FOR040000 - Persian
FOR041000 - Romance Languages - (Other)
FOR042000 - Swahili
FOR043000 - Swedish
FOR044000 - Vietnamese
FOR045000 - Old & Middle English

Hints:

Subjects in this section are for works about the languages specified, whether these works are of an instructional, historical, or linguistic nature. Do not use subjects in this section to indicate the language of a work: works should be classified based on their subject content without regard to the language in which they are written (of course, if a work is about a language and written in that language, a subject in this section should be assigned).