I'll translate almost anything, be it plain text, manga, hentai, or even games. I'll only refuse to translate if it's something I hate.
The price depends on the amount of time I have to spend on it, but since I'm currently unemployed, I'll work for cheap. Though at the moment I have no examples of how much something would cost, since I'm new to commissions.
But generally speaking, plain text is cheapest, manga requires quite a bit of work, hentai is a bit more demanding in the SFX department, and a game will probably cost way too much unless it's a short one.
The ideal scenario for me is translating short stories and oneshots (be it manga or hentai), so I'll gladly take those.
I mainly translate from Japanese into English, but I also know Spanish to the same level as English. I also speak Russian, but my writing level is low, so I probably won't translate into Russian.