Choose a peculiar typeface such as Arial Black or Helvetica Black as your preferred Western typeface. Then look which lines below are displayed in Arial/Helvetica Black and which are not. Also, choose different encodings from the menu “View > Character Encoding > More Encodings > …”

--:  0123456789 abcdefghijklmnopqrstuvwxyz
xx:  0123456789 abcdefghijklmnopqrstuvwxyz
en:  0123456789 abcdefghijklmnopqrstuvwxyz

el:  0123456789 abcdefghijklmnopqrstuvwxyz

be:  0123456789 abcdefghijklmnopqrstuvwxyz
bg:  0123456789 abcdefghijklmnopqrstuvwxyz
mk:  0123456789 abcdefghijklmnopqrstuvwxyz
ru:  0123456789 abcdefghijklmnopqrstuvwxyz
sr:  0123456789 abcdefghijklmnopqrstuvwxyz
uk:  0123456789 abcdefghijklmnopqrstuvwxyz
mn:  0123456789 abcdefghijklmnopqrstuvwxyz

he:  0123456789 abcdefghijklmnopqrstuvwxyz
yi:  0123456789 abcdefghijklmnopqrstuvwxyz

ar:  0123456789 abcdefghijklmnopqrstuvwxyz
fa:  0123456789 abcdefghijklmnopqrstuvwxyz
ps:  0123456789 abcdefghijklmnopqrstuvwxyz
sd:  0123456789 abcdefghijklmnopqrstuvwxyz
ur:  0123456789 abcdefghijklmnopqrstuvwxyz

hi:  0123456789 abcdefghijklmnopqrstuvwxyz
mr:  0123456789 abcdefghijklmnopqrstuvwxyz
ne:  0123456789 abcdefghijklmnopqrstuvwxyz
sa:  0123456789 abcdefghijklmnopqrstuvwxyz

th:  0123456789 abcdefghijklmnopqrstuvwxyz