Hi,
I usually use two (2) languages when editing documents. Greek and American English. In order to do proper spell checking, I frequently have to switch between those two languages.
Sorry for interrupting in your conversation but it would be great to add at least something like favourites languages. I found this irritating too, switching between two languages is really time consuming.
I hope you will provide the ability to select which languages appear in the list in the near future, because it is very annoying to search all this list to select the language each time you change the keyboard from Greek to English and vice versa.
This is also true for all non-english speaking users.
Just try to write a sentence that has mixed french and engish, or german and english, and you will immediately realize the frustration it will cause. This case is very common because many non-english documents use words (mostly terminology) in english.
In Microsoft Word, you do not have to change the language of the text manually, because it follows automatically the change of language on the keyboard. I can understand that this is not an easy thing to do, because OnlyOffice runs on several platforms.
But at least you can provide a way (even through a text configuration file) that the user can limit the languages that appear in the list, to the languages that he/she uses.
As for the solution, I do not think that all this huge catalog of languages should appear in the list at all.
Maybe a system that you select (install?) the languages that appear there.
For example French and English US or German and Endlish US etc.
In most cases only one to three maximum number of languages are needed.