hmmm ... it would seem to me self contradictory if additional points are awarded to foreign ESL students. The authors of the LSAT believe it to be an indicator of first year ability at ABA approved US and Canadian law schools. For better or worse, these US and Canadian law schools teach their law classes in english. Therefore, any difficulties faced by non-native english speakers when taking the LSAT would also be faced by these non-native english speakers in their first year of law school. Since the LSAT is supposed to be an indicator of first year ability in law school any handicaps exposed by a poor score on the LSAT are legitimate (e.g. inability to reason, inability comprehend what one reads, inability to understand the language in which the actual law school classes will be taught, etc.).
I'm not saying that the LSAT actually IS a good indicator of first year performance. I really am ambivalent on that point. But if one accepts that it is a good indicator I think any deficiencies one might have which prevent good performance on the LSAT are deficiencies that would prevent good performance in the first year.