1. Can you translate K in L? If not, go to 2. Else go to #?
2. Does L exist? If "yes", go to 3. If "no", go to 4.
3. Does the key exist in the server's language? If "yes", go to 5. If "no", go to 6.
4. Log that the language does not exist ONCE. Go to 1, and use server_language for L.
5. Log that a translation is missing for K->L. Go to 1, and use server_language for L.
6. Log that a translation is missing for K->L for both languages. If the server_language is "en", go to 7, else go to 8.
7. Translate as ML_NOTFOUND. Go to 9.
8. Does K exist in "en"? If so, go to 9 with L="en". Else, go to 7.
9. If not translated and a translation can be made, do it and fill the string.