Problem with my universal translator

It's a bit weird, but my UT occasionally fails to translate a word. These all seem to be very specific words, but I can almost always figure out the meaning from context, so it can't be that there isn't way to say the word in English. Has anyone experienced a similar problem -- is it the same words for you, or are they different?

Some examples:

• Qapla
• petaQ
• DaiMon
• Groppler
• Gul
• Katra
• Pagh
• Oo-max