This guide states roughly which languages to consider and/or prioritize adding and/or translating to when submitting and/or reviewing Commons content, depending on the countries involved.
If you do not know one or more of the involved prioritized languages for a given topic, post a request at Commons:Translation requests for the given languages and/or message a Wikipedian who does know that language who can help you
Other languages by area
The priorities of adding non-English languages depends upon the countries involved. Users are encouraged to consider languages that are important for the subjects.
- Israel: Hebrew for all content. Arabic for content related to the Israeli Arab community, El Al Airlines, and Israeli governmental institutions. In many instances Russian would also be helpful.
- Finnish for all Finland-related topics, Swedish for many topics.
- French for all France-related topics
- Spanish should be prioritized for the City of Paris, RATP-related content, and areas close to the Spanish border
- German should be prioritized for RATP-related content and areas close to the German border
- Italian should be prioritized for RATP-related content and areas close to the Italian border
- Italian for all Italy-related topics
- French for areas close to the French border
- German for areas close to the German border
- Castillian Spanish for all Spain-related topics
- For federal Spanish government, also add Basque and Catalan. Some federal topics may also need French.
- For content involving regions with minority languages (like Basque and Catalan) add descriptions in those languages
- Federal institutions need content in German, Italian, and French
- By canton, the languages to be prioritized are the languages of that canton - The other languages used throughout Switzerland but not in that canton would be good to add also.
- United Kingdom
- Add Welsh descriptions for content involving Wales
- Strongly consider adding French descriptions, especially if provincial and/or territorial agencies and/or major cities (Toronto, Vancouver) in non-French speaking areas are involved. French is very important for everything involving the federal government and for the provinces of Quebec, Nunavut, Northwest Territories, and New Brunswick. The Inuit Language is very important for the province of Nunavut. The nine official First Nations languages of the Northwest Territories would be helpful for content related to that province.
- If content involves major cities, provincial/territorial agencies, and/or other major ethnic communities, consider adding descriptions in other relevant immigrant languages (Chinese, Hindi, Vietnamese, etc.)
- For First Nation institutions, people, and/or things, add descriptions in the relevant First Nations languages
- All content should have Spanish descriptions
- For indigenous Mexican institutions, people, and/or things, add descriptions in the relevant indigenous languages (Nahuatl, Zapotec, Mixtec, Mayan, etc)
- United States
- Strongly consider adding Spanish descriptions, especially if the content involves the Hispanic American community, the states of Florida, California, Texas, Arizona, and/or New Mexico, the federal government, major state agencies, and/or major cities (New York, Los Angeles, Chicago, Houston, etc) - Spanish is very important for content involving the commonwealth of Puerto Rico
- If content involves major cities, state agencies, and/or other major ethnic communities, consider adding descriptions in other relevant immigrant languages (Vietnamese, Chinese, Arabic, Urdu, Hindi, Russian, Hmong, etc.)
- For Native American institutions, people, and/or things, add descriptions in the relevant Native American languages
- For Hawaii-related topics, it would be a bonus if you added descriptions in Hawaiian
- Other Spanish-speaking countries
- Spanish-speaking countries
- French Guiana
- Brazilian Portuguese