Hi Hoefti,
No, unfortunately we are currently unable to produce german spellcheck functionality (or, for that matter, functionality in any language other than english). The spellcheck algorithm (SOUNDEX) basically classifies words into different numeric sound values. For example, the words "gasser", "geiger", "geyser", "gazer", "goucher", and "gusher" all have the soundex "G260", while "gossamer" has a soundex value of "G256". These values are used to determine like-sounding words.
For example, if you check the spelling of "goser", which isn't a word, but has a soundex value of "G260", you'll get all of the other "G260" words back. Now, our module also goes a little further by sorting out words based on similarity to the misspelt one - "gasser" is closer to "goser" than "geiger" or "gusher".
The values are based on the sounds of certain letters in the english language. If another language has an alternative common pronunciation of a particular letter, this will throw off the algorithm and may result in incorrect results. How accurate the soundex results will be depends on how much like english another language is in terms of the sounds of individual letters.
We're certainly willing to try it out on a trial basis, to see how well it works with other languages. If it turns out to work well with other languages, we'll certainly look at including it in future
Gossamer Threads releases.
Jason Rhinelander
Gossamer Threads jason@gossamer-threads.com