I haven't learned another language. I do admire people who learn others, especially this one, well. I've been enrapt in it since I learned to talk. The appendixes of a great dictionary help me 'read' several.
I remember the first time I saw a language family tree in a dictionary. I could see exactly how far back I could figure out, with the other dictionary, with the word derivation appendix. I was about twelve.
I love to compare definitions in dictionaries published decades apart. If the victors write history, it's obvious the hippies won. The definitions from 1969 and 1999 are very different.
That one has the perpetual calendar and that one has the easiest conversion tables to use. That one has foreign phrases and that one has famous quotes. That spot and 'Fem" as polite address are my best hopes of getting in my favorite book, someday.