The following is the results of both blind googling and brute forcing the keyboard space. If this is incomplete, please let me know so that can be fixed.
|Accent/Ligature||How to type||Example|
|œ (oe ligature)||Alt-q||œuf|
|« (left quote)||Alt-\||«salut!»|
|» (right quote)||Alt-Shift-\||«salut!»|
You can also type a forward facing accent on most arbitrary characters by typing it and then pressing Alt-Shift-e. Circumflêxes can be done postfix with Alt-Shift-i too. Thís dóesńt work on every letter, unfortunately. However it does work for enough of them. Not enough for Esperanto’s
This article was posted on 2019 M5 10. Facts and circumstances may have changed since publication. Please contact me before jumping to conclusions if something seems wrong or unclear.