A good translated version of phpBB-SEO would be great of course. Just saying that implementing phpBB-SEO in German boards can be easily done at the moment with very little modification needed. Like 95%+ of the englisch text is just in the ACP and admins who install phpBB-SEO should be able to read and understand not just that text, but also quite some threads here (which obv are english too). So to make it short: Every translation is great, sharing it is very nice, but people who use the mod will still need to understand english texts / threads.
I install and configure phpBB-SEO (and other mods) for a fair price and very fast. If you are interested simply send me a private message.