Hi,
Flare 0.18
"engine.fr.po" line 877 :
#: ../../../src/MenuPowers.cpp:582 ../../../src/MenuPowers.cpp:585#, c-formatmsgid "Requires Power: %s"msgstr "Nécessite le pouvoir: %d"
Note the "%d" instead "%s"
Bugfix pending to 0.18 branch at https://github.com/clintbellanger/flare-engine/pull/560