Is spoken part clearly identifiable? Yes - via the document_id prefix, which names the source type: book (15), grammar (2), film (2), conversation (1). conversation and film (transcribed dialogue/subtitles) are plausibly spoken; book/grammar are written - please confirm whether film here means subtitle/transcript text.
Metadata review
languages and translation(s)
Field
Advice
english
change to text_eng
parallel_id
corpus-specific (sentence-level) - verify against metadata.html