Ijsdrakon have very strong magics. These are immensely hard to learn.
The word ijsdrakon is nothing more clever than two similar-sounding synonyms for "ice" and "dragon". It's pronounced ICE-dra-konn.
The ijsdrakon language is ijsdraken (ice-DRAH-ken). They have a system of symbols partway between rune and glyph, but do not tend to engage in physical writing.
Ijsdrakon and ijsdraken are interworld common words - borrowed from random other languages, true, but they are the accepted terminology. Ijsdraken words for their species, language or anything else are not generally known.
Compare: Grundraak