LANGUAGE BARRIER CAUSES MISCOM REGARDING LNDG CLRNC; THEN ADDITIONAL PROB ON TAXI OUT FOR TKOF.

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WE WERE CLRED FOR APCH TO RWY 30 IN ISLAMABAD; PAKISTAN; AND TOLD TO CONTACT TWR. FO SWITCHED TO 123.7 AND RPTED 'ILS INBOUND' AND WE WERE CLRED TO LAND. TWR PHRASEOLOGY WAS NON STANDARD AND HIS COMMAND OF ENGLISH WAS LIMITED; BUT WE WERE CLRED TO LAND. AFTER LNDG; A 180 DEG TURN ON THE RWY AND BACK-TAXI WAS REQUIRED IN ORDER TO ENTER THE RAMP. THREE ATTEMPTS TO CONTACT ON TWR FREQ (123.7) FOR TAXI CLRNC WERE INEFFECTIVE. THE TWR IS LOCATED BEHIND A LARGE HANGAR AND XMISSION MAY HAVE BEEN BLOCKED. DURING THE TAXI WE SWITCHED RADIOS AND WERE FINALLY ABLE TO CONTACT THE TWR; AT WHICH TIME WE WERE ACCUSED OF LNDG WITHOUT A CLRNC. A LATER PHONE CONVERSATION AFTER BLOCK- IN APPARENTLY SOLVED THE MATTER. LATER; ON TAXI OUT; WE RECEIVED CLRNC TO 'THE HOLDING POINT RWY 12 TO BACK TRACK ON THE RWY.' AS WE PROCEEDED TO EXECUTE THIS MANEUVER WE WERE ACCUSED OF VIOLATING A TAXI CLRNC AND ENTERING THE RWY. ALL OF US UNDERSTOOD THE CLRNC IN THE SAME MANNER AND PROCEEDED AS DIRECTED PRIOR TO THE ACCUSATION. IN MY OPINION; HIS LACK OF COMMAND OF ENGLISH AND NON STANDARD AVIATION TERMINOLOGY WHICH IS ACCEPTED WORLD-WIDE LED TO HIS CONFUSION AS TO WHAT HE HAD CLRED US TO DO.