the "VT-DEFAULT_SHOW_ALL_VIEW" key should be "VT_DEFAULT_SHOW_ALL_VIEW" (note: "VT_", not "VT-").
The other key "VT_UNIT_SHORT_NORTH" is in the latest Mobile.english.lang file around line 39.
Would you be interested in sharing your German language files?
It would be great to have them in the distribution.
Please send us an email on "support (at) gpsgate . com" to discuss that.