Have noticed the following conspicuous typos in the diplomatic screens. Have fixed in my local copy but thought I would share:
[DiplomaticModifiersText.xml]
"You proclaimed friendship my enemy"
"We have an common enemy"
"You are allied with infedels"
"You have treaties with infedels"
Also, a few statements have unnecessary periods at the ends of them.
[FlavorText.xml]
"We would like to offer you financial aid and hope that it will strength our relationship"