FLC HAS RWY INCURSION.

Narrative

WHILE TAXIING FOR TKOF RWY 9 AT CCS; TWR ASKED US IF WE WERE READY FOR IMMEDIATE TKOF. WE RESPONDED YES. TWR THEN CLRED US INTO POS AND HOLD; BE READY FOR IMMEDIATE TKOF; WHICH WE ACKNOWLEDGED. I CHKED FINAL AND SAW COMMUTER ACFT TFC ON FINAL. POINTING IT OUT TO THE CAPT; I SAID; 'YOU SURE YOU WANT TO DO THAT?' OR SOMETHING TO THAT EFFECT. CAPT SAID YES; AND WE BOTH FELT THAT GIVEN THE RANGE AND SPD OF THE TFC ON FINAL; THERE SHOULD BE NO CONFLICT AS LONG AS THERE WAS NO DELAY. AT THIS POINT THE TWR SENDS THE COMMUTER TFC AROUND. THE TWR TAXIES US DOWN THE RWY TO TURN OFF AND TRY AGAIN. THE TWR ASKS US WHY WE TOOK THE RWY. WE TOLD HIM WHAT WE BOTH HEARD. HE SAID 'NO; YOU WERE CLRED INTO POS AND HOLD AFTER LNDG TFC.' THE CTLR'S ENGLISH WAS VERY BAD; BUT THE CAPT AND I WERE CONFIDENT IN WHAT WE HEARD. IT TOOK A LOT OF CONCENTRATION TO UNDERSTAND THIS CTLR. THE QUALITY OF THIS CTLR'S ENGLISH WAS THE MOST SIGNIFICANT FACTOR IN THIS INCIDENT. ADDITIONALLY; THIS CTLR SPOKE TO OTHER ACFT IN THE PATTERN IN SPANISH; INCLUDING THE TFC ON FINAL; WHICH REDUCED OUR OVERALL SITUATIONAL AWARENESS.