Unity in diversity (Arabic)
Our roots are diverse (Western Frisian)
Support inclusion (Yiddish)
May no ocean separate us (Gaelic)
Promote understanding (Georgian)
Consider new ideas earnestly (French, preferably a northern dialect)
Consider even your supposed enemies (Korean or Mongolian)
Fragmentation gives way to animosity (Xhosa)
Thrive even through adversity (Any stigmatized creole language, preferably not truly threatened or endangered)
Take note of the past (preferably Pennsylvania German. Palatinate German or Standard German would also work, though)
Anyone who knows any of the needed languages is encouraged to comment! Thanks to all who help me out!