in subtitle, a vertical line appears over e
goe̍h

line 6 1st word has vertical line over u
tau̍h

line 11 word has vertical line over a and i
pa̍t-mi̍h
and indeed, it replaces the dot over the i, and it is distinct from an i with accent.

line 12 1st word has vertical line over e
pe̍h

line 23 it appears over the o
tio̍h