Translation:When I have more time, I will study more.
October 28, 2017
Not sure about the sources for your "strictly speaking" assertion about "will" after "when".
You may want to have a look here:
We do not normally use will in clauses with if or with time words:
- I’ll come home when I
- We won’t be able to go out if it
- It will be nice to see Peter when he
will get homegets home.
- You must wait here until your father