It's not unpronounceable for Irish Gaelic speakers. Most of the country speaks a dialect of Gaelic that is unique to their locale. I'm still working on both Irish and Scots Gaelic. I'm making better progress on the Scots version. The rules for pronouncing Gaelic are more complex than Welsh. Trying to listen to Gaelic and write down the words is still a challenge for me. By comparison Welsh and German come across purely phonetic and easily converted from spoken to written form.
If you want phonetic, try Italian.
The language is so phonetic that the concept of spelling doesn’t even exist.