Technical Services Units:
For translated titles use the following language codes after a colon. Codes are given for the languages seen most often. If the language is not on the list, use the three-letter MARC code for that language. For general instructions on translations, click here.
| A | Arabic | LI | Lithuanian |
| AF | Afrikaans | LO | Low German |
| AL | Albanian | M | Marathi |
| AN | Anglo-Saxon | MA | Macedonian |
| AR | Armenian | MD | Middle Dutch |
| ARA | Aramaic | ME | Middle English |
| AS | Asian languages in Cyrillic | MHG | Middle High German |
| B | Bulgarian | MLG | Middle Low German |
| BE | Bengali | MO | Moldavian |
| BM | Bemba | N | Norwegian |
| BY | Belarusian [Byelorussian] | NA | Navaho |
| C | Coptic | NY | Nyanja |
| CA | Catalan | OE | Old English |
| CH | Choctaw | OF | Old French |
| CHA | Chiapanec | OJ | Ojibwa |
| CHI | Chinese | ON | Old Norse |
| OJ | Chippewa [use Ojibwa] [formerly CHP] | OS | Old Swedish |
| CHU | Church Slavic | OSA | Old Saxon [Old Low German] |
| CR | Croatian | OSP | Old Spanish |
| CZ | Czech | P | Portuguese |
| D | Dutch | PA | Panjabi |
| DA | Danish | PE | Pennsylvania German |
| DAK | Dakota | PO | Polish |
| E | English | PP | Papiamento |
| ES | Estonian | PR | Provencal |
| ESP | Esperanto | Q | Quechua |
| ET | Ethiopic | R | Russian |
| F | French | RO | Romansh [Raeto-Romance] |
| FI | Finnish | RU | Romanian |
| FL | Flemish | S | Swedish |
| G | German | SA | Sanskrit |
| GA | Gaelic (Scots) | SC | Scots [Lowland Scots] |
| GL | Gallegan | SE | Serbian |
| GE | Georgian | SL | Slovak |
| GI | Gilbertese | SO | Sorbian [Wendish] |
| GN | Guarani | SP | SP Spanish |
| GR | Greek | SV | Slovenian |
| GU | Gujarati | SW | SW Swahili |
| H | Hawaiian | T | Turkish |
| HA | Hausa | TH | Thai |
| HE | Hebrew | TI | Tibetan |
| HI | Hindi | TO | Tonga [Zambesi] |
| HU | Hungarian | TS | Tswana |
| I | Italian | U | Ukrainian |
| IC | Icelandic | UR | Urdu |
| IR | Irish [Irish Gaelic] | V | Vietnamese |
| J | Japanese | W | W Welsh |
| JI | Jivaro | SO | Wendish [use Sorbian] [formerly WN] |
| K | Karen | BY | White Russian [use Belarusian] [formerly WLN] |
| KA | Kashubian | XHO | Xhosa |
| KO | Korean | Y | Yoruba |
| KS | Kashmiri | YI | Yiddish |
| L | Latin | Z | Zulu |
| LA | Latvian |
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