Issue

Do I pronounce it their way?

Guidelines

• Your character is an American tourist in Paris, trying to order dinner in French. If he butchers the language, it's okay. But the waiter's French should be spot on.
• The third-person narrator should pronounce the words correctly. The exception is when there is an accepted English pronunciation for the word (i.e., words of foreign origin, names, etc.). For example the city Paris is "pear-ris" although the French pronunciation is "pah-ree" with the same spelling.
• Be consistent. If the character pronounces Italian well in Chapter Two, he shouldn't have forgotten it in Chapter Ten.

If you are facing printed words in non-Roman alphabets (Chinese, Russian, Japanese), get expert advise. I'd suggest that even though you are almost sure you know how to pronounce them. Record the correct sound and practice it. Make your own recording of it and compare the sounds, then get the expert to correct any mistakes. Finally, write out an English approximation.

• For example the Russian word for "thank you" is close to spuh-see-buh (emphasis on see)

and the Russian word for "you're welcome" is close to puh-djal-stuh (emphasis on djal). 'dj' sounds something like the "g" in genre.

There are pronunciation-related websites. Since they come and go, I don't want to list a link that will be dead tomorrow. Better that you use a search engine.