I am almost finished with the translation. However, I can't finish it without understanding the context of some phrases, so please help me with this
Ear magic - a literal translation would look stupid, so we need to adapt to the situation. Maybe it's a listening course or something?
Addict - for example, "kanji addict". Maybe it's slang for a person who is addicted to learning kanji, but I need to know x)
Streaker - I was looking for what else it could be. Maybe it's slang again, and you meant a runner (not necessarily naked) or a sprinter?
Fixer upper - there is no definition in Ukrainian for people who renovate houses for resale, I couldn't find any other meaning. Please explain the context
Oldtimer- at first glance, is not a complicated one, but Ukrainian has many words to describe the same thing, but with small differences. Does it mean someone who has been using renshuu for a long time, or perhaps has lived somewhere for a long time, or has a lot of experience?