Some Christian coins might seem foreign, if you can't read the legends or are not sure of the origin of a coin. Can you post any? I'll start with the following coin: Georgia: Giorgi IV Lasha (1208-1223) AE unit (Kap-66; Bennett-179) Obv: Design of six knots surrounding two-line central Mtavruli legend: ႢႨႻႤ / ႧႫႰႱႠ (Giorgi son of Tamar). Outside of knot design, circular Mtavruli legend: † ႱႾႤႪႨႧႠ ႶႧႠ ႨႵႬ ႽႤႣႠ ႥႺႾႪႱ ႠႫႱ ႵႩႱ ჃႪ († In the name of God, this coin was struck in the year 430 of the koronikon) Rev: Central four-line Arabic inscription: ملك الملوك (The King of kings,) جلال الدنيا و الدين (Glory of the world and faith,) كيوركى بن تامار (Giorgi, son of Tamar,) حسام المسيح (sword of the Messiah) Marginal Persian legend: بنام خداى پاك اين سيمرا زده اند بتاريح چهار صی وسی سال (In the name of God most pure, this coin was struck in the year 430)
The coinage of the Norman Kingdom of Sicily comes to mind. Christian medieval rulers using Kufic script and "oriental" iconography on their coins are otherwise quite rare: Norman Kingdom of Sicily, under William II "the Good," AE trifollaro, 1166–1189 AD, Messina mint. Obv: lion's head facing. Rev: palm tree. 26mm, 10.27g. Ref: Spahr 117; Biaggi 1231. Norman Kingdom of Sicily, under William II "the Good" follaro, bronze 1166–1189 AD, Messina or Palermo mint. Obv: Lion's head left. Rev: Kufic script: "al-malik Ghulyalim al-thani" ('King William the second'). 14mm, 1.87g. Ref: Spahr 118.