Strange characters in proverb list

[treebus.waling]

Sometimes I find some strange characters in the African Proverb List, like ð, þ, and capital G and Ç in the center of words. These are no African letters, so I have to convert them into special characters
(I suppose special accented characters).
Can anybody explain this, is there a list to convert them into normal language?
I am interested. I give some examples of Ewe proverbs with this abracadabra.
Thanking you in advance,

Karel F. Treebus, The Netherlands


mekpG (the last one with that capital G after the p)
dzidzÇ (the last one with that C-cedilla)
Baþa medoa kalê ha ða o.



Ewe Proverbs (West Africa-Benin, Ghana,Togo)

ÚutÇtrÇ ñue wotrÇa ýeðuðu ðo.
Ne tekpopoe mekpG epokui fe geme o la mepoa qku o
Devi pG ame tsitsi kuku efe ta pe wrbuna pe eme.
Asi tu nyede metua agGpG o.
Agbe nyaqe (pGe) metia agbetG o.
Lc si le arnegbG lc lolo woyGna net


Fu kple dzidzÇ la nÇviwo wonye.
Agalã be ne yele axa dzi zÇm hã menye mÇ yebu o.
KÇdzo Dei be yele Blu fiam gakeyeþe ñku le Ewegbe ñu.
Baþa medoa kalê ha ða o.