$ python -m aeneas.tools.execute_task --list-values

[INFO] Parameters for which values can be listed:
aws
espeak
espeak-ng
festival
is_text_type
is_text_unparsed_id_sort
nuance
os_task_file_format
os_task_file_head_tail_format
task_adjust_boundary_algorithm
task_language


$ python -m aeneas.tools.execute_task --list-values=is_text_type

[INFO] Available values for parameter 'is_text_type':
mplain
munparsed
parsed
plain
subtitles
unparsed


$ python -m aeneas.tools.execute_task --list-values=espeak

[INFO] Available values for parameter 'espeak':
af	    Afrikaans
afr	    Afrikaans
an	    Aragonese (not tested)
arg	    Aragonese (not tested)
...
yue     Yue Chinese (not tested)
zh	    Mandarin Chinese (not tested)
zh-yue	Yue Chinese (not tested)
zho	    Chinese (not tested)

