I had the same problem with OOWriter in 10.10 (but not in previous versions). Since behavior of Libre Office has the same problem, I think the problem is in the OS.If I want to reselect German after every word, I could eventually get thru it, but it would take a lot of time and more patience than I can muster, The German dictionary is definitely there, because when I reset, it accepts correct German words. Working with the red underscore is impossible.
- If you have copied text output that contains formatting (colors, highlighting, etc.), please do not enclose it in QUOTE or CODE tags. Just right-click your mouse and choose "Paste Without Formatting" or similar (Paste as plain text).