Every language has sounds that other languages do not have. For example, I would guess that out of 10 Germans that are able to express themselves in English hardly 3 of them would be able to pronounce a correct "th".

The problem that native English speaking persons have with other languages, and that are the main reason for all those "how is it sayed" threads here is the confusion that the English languages creates with vowles:

be

beer

beat

Three ways ot write a sound that would be correct displayed in the Latin alphabet with non of these but with: "i". But that isn't also unknown to the English language, example:

is

it

with

On the other hand "i" can also be pronunced "aye" and "e" is not always "i" but also the correct "e", example

bed


So, it is clear (what should be written "clir" or pronounced "clar") that native English speaking people have difficulties to simply guess how a word is pronounced written in the alphabet they use themselves, as long as they don't know it somehow. And it becomes also clear that other people often do not understand the difficulties with that. How is Triarii pronounced? The way it is spelled: Tri-ar-i-i.