I was reading a Latvian-English vocabulary and I found the meaning of bagāža being luggage, but in another dictionary I found it means baggage. So, my ask is: Is bagāža only personal baggage or any baggage?
However in English the words are used interchangebly - synonyms. Baggage = personal belongings packed in suitcases for travelling. (Perhaps Americian English) Luggage = Originally meant inconviently heavy baggage ; nowadays it simply means suitcases or other bags for a traveller's belongings. (More common in British English)
Baggage and luggage may really mean almost the same in Latvian the same way as in English. It means the things you carry when you go for vacation, or somewhere else. It is any type of baggage, but it depends on the context. It may not be used the same way as in English. It does not refer to empty suitcases though, or the suitcases you are about to buy -- only things carried in suitcases or something else (including the suitcases).