TypeError: list indices must be integers or slices, not tuple, Issue happens in a parallel corpus

Question

The following is my dataset. It is a parallel corpus.

[[\'Service eka godaak hondai\', \'සේවාව ගොඩාක් හොඳයි \'], [\'Kama rasai \', \'කෑම රසයි \'], [\'Godak fresh and