[liontwist]

Those are the non-English words mixed in.

Individual letters don’t have sounds, but trigrams do.

[lkbm]

Given that that's something like half of our lexicon, you're going to have a heck of a time reading if you can't process any of them, but okay, let's look just at words that come from Old English:

food, good

rough, dough

two, to, too