pick one's nose

English

(idiomatic) To insert a finger or other object into one's nostril to remove obstructions, especially dried mucus.
You can pick your friends; you can pick your nose; but you can't pick your friends' noses.

insert a finger into one's nostril

Arabic: دَخَّلَ إِصْبَعَهُ فِي أَنْفِهِ‎‎ (daḵḵala ʾiṣbaʿahu fī ʾanfihi)
Egyptian Arabic: لعب في مناخيره‎‎ (lé3eb fi manakhiiroh)
Armenian: քիթը քչփորել (kʿitʿə kʿčʿpʿorel)
Chinese:
Cantonese: 撩鼻屎 (liu¹ bei⁶ si², liu² bei⁶ si²)

Mandarin: 挖鼻子 (zh) (wābízi), 摳鼻子, 抠鼻子 (kōubízi), 挖鼻 (wābí)
Czech: dloubat se v nose
Danish: pille næse
Dutch: pulken (nl)
Esperanto: please add this translation if you can
Finnish: kaivaa nenäänsä
French: se curer le nez, se mettre le doigt dans le nez, fourrer son doigt dans son nez
Georgian: please add this translation if you can
German: in der Nase bohren, in der Nase herumbohren, sich in der Nase pulen (North German), popeln (de) (colloquial)
Greek: σκαλίζω τη μύτη μου (skalízo ti mýti mou)
Hebrew: לחטט באף‎‎
Hindi: please add this translation if you can

Icelandic: bora í nefið
Indonesian: mengupil (id), ngupil (colloquial)
Italian: mettersi le dita nel naso, scaccolare, scaccolarsi
Japanese: 鼻を穿る (はなをほじる, hana-o hojiru), 鼻をほじくる (はなをほじくる, hana-o hojikuru)
Korean: 코를 파다 (koreul pada)
Latin: please add this translation if you can
Macedonian: чепка нос (čépka nos)
Norwegian: plukke nesen
Polish: dłubać w nosie
Portuguese: cutucar o nariz, limpar o salão
Russian: ковыря́ть в носу́ (kovyrjátʹ v nosú), ковыря́ться в носу́ (kovyrjátʹsja v nosú), колупа́ться в носу́ (kolupátʹsja v nosú)
Spanish: hurgarse la nariz
Swedish: peta näsan, peta i näsan
Thai: please add this translation if you can
Ukrainian: колупати в носі (kolupáty v nósi), довбати в носі (dóvbaty v nósi)
Vietnamese: ngoáy mũi, cạy rỉ mũi