IBM Text to Speech: How to have correct pronounciation of English words in German text?

Question

I am using the IBM Text to Speech to process some German texts. Pronounciation of the text with a German voice is working ok. However, the text contains some English words and phrases. For those, the pronounciation sometimes is incorrect. How can I fix that?

Example:
Er kommt aus Amerika und nennt sich TJ.

TJ should be pronounced like someone from California would do.

Answer 1

I was able to make it work by using Speech Synthesis Markup Language (SSML) on my text. The German text remains the same. For the English expressions I provided some "phonemes". Here is the one for TJ:

<phoneme alphabet="ibm" ph="tIZE">TJ</phoneme>

I had to use German symbols which can be found in the docs.