update single language strings to plural

How do i update single language strings to plural in my *.po file ? Im using Poedit to translate catch-evolution.pot to Hebrew. i noticed the "One thought on “%2$s”" string in my he_IL.po file is singular.so for example i cannot translate this string: "2 Comments ↓" but i noticed in the bs_BA.po file the same string has an option to translate into plurar like this "%1$s thoughts on “%2$s”" How can i make the same appear in my he_IL.po file so i can translate it ? i tried to use the newest catch-evolution.pot file but there is no plurar option showing up. thanks