I should do that. One big hint is that all the clues can be plugged into Google Translate. They should give accurate translations back into English.
The other key is to determine which city you should fly to next based on the language/message of each clue.
More generally, as with most text adventures itt good to ‘look at’ (or ‘ex’, short for examine) things mentioned in the description of a place.
Did you find the first clue?