Chapter 15: Again At Tezcuco. 

Until a late hour in the night, Roger sat talking to Cacama and his family. Although they had heard, from Bathalda, all that had happened from the time of their leaving Tezcuco to their arrival at Tlascala, he had to go over it again. Bathalda had told them that Roger had found a former acquaintance in Malinche, who was all powerful with the white leaders; and Amenche asked many questions concerning her--how Roger had known her before, and for how long; what she was like, and why he applied to her, instead of going straight to the white general. 

"You have heard me speak of her before," Roger said, in answer to the first question. "I told you that I had learned your language from a Mexican slave girl, who was one of my attendants during the time I was at Tabasco. She was with me the whole time I was there, and if it had not been for learning the language from her, and conversing with her, I do not know how I should have got through the time. I was sorry to leave her behind, and promised her that, if ever I got rich enough here, I would send and purchase her freedom." 

"You seem to have taken a strange interest in a slave girl!" Amenche said. 

"It was natural that it should be so, Princess. I was little better than a slave, myself. At any rate I was a prisoner, and naturally took to the one person who was kind to me. We were companions and friends, rather than master and attendant; and directly I heard that she was with Cortez, and had gained great influence with him, I naturally went to her." 
Was the language they used Roger's mother tongue?
 "I told you that I had learned your language from a Mexican slave girl