Verb conjugation of "expérimenter" in French

After next week, I will tutor the Mr. Zillmay from the language lab in Los Angeles, he is currently in the states. The lesson will take place in LA, but it may be held no earlier than mid-February.
The idea is to use the sourcing to get as much information as possible about learning abilities and disabilities in average. This way we can determine and forecast best practices for language learners based on some parameters.
I am 73 and I am learning German because my grandchildren do not speak English. I am learning at the Goethe Institute in London. One last question: why do you want to learn Spanish? Many greetings.