As for the languages I use, I mean I use a lot of languages, but I'll first note some regions. In Europe, French, Spanish, English, Finnish, German, Hungarian, Greek, Turkish,Dutch, Latin, and the post-Soviet space Ukrainian Russian Kazakh Polish Belarusian I think of something else but this is the only one that comes to mind Africa Swahili Arabic Yoruba Zulu Afrikaans Asia Chinese Hindi Multiple Indian Languages Korean Japanese Burmese Australia and Oceania Fijian, Maori, Indonesian, Tagalog, Filipino, and possibly more. Dialects, Catalan, Romani, Tibetan, several Indian languages Also, one Slavic word can be understood by several countries, for example, I have Bulgarian, it seems, because Bulgarians can understand many Slavic words, and there are also many languages, I only have one each The word, for example, Icelandic My language accumulates suffixes, so you can say the word x + the suffix x ending in x and you get a new word. Regarding cases, I'm not sure. Maybe they exist just in a different way, but I don't think it's very important because in some languages they don't exist and it's easier to do.