I think, therefore I am

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Calque of French je pense, donc je suis or perhaps of Latin cōgitō, ergō sum. First written in French by René Descartes, a 17th century French philosopher, in Discourse on the Method (1637) as je pense donc je suis, which he later expressed in Latin in Principles of Philosophy (1644).

69 source translations are retained for this English entry.

• Albanian: mendoj, pra jam — philosophical proof of existence
• Arabic: أُفَكِّر، إِذَن أَنَا مَوْجُود (ʔufakkir, ʔiḏan ʔanā mawjūd) — philosophical proof of existence
• Arabic: أُفَكِّر، إِذَن أُوجَد (ʔufakkir, ʔiḏan ʔūjad) — philosophical proof of existence
• Arabic: بفكّر فموجود (bafakkar famawgūd) — philosophical proof of existence
• Armenian: մտածում եմ, ուրեմն կամ (mtacum em, uremn kam) — philosophical proof of existence
• Breton: prederian, hiviziken me on — philosophical proof of existence
• Catalan: penso, llavors existeixo — philosophical proof of existence
• Chinese Cantonese: 我思故我在 (ngo5 si1 gu3 ngo5 zoi6) — philosophical proof of existence
• Chinese Mandarin: 我思故我在 (wǒ sī gù wǒ zài) — philosophical proof of existence
• Czech: myslím, tedy jsem — philosophical proof of existence
• Danish: jeg tænker, derfor er jeg — philosophical proof of existence
• Dutch: ik denk, dus ik ben — philosophical proof of existence
• Esperanto: mi pensas tial mi estas — philosophical proof of existence
• Estonian: mõtlen, järelikult olen — philosophical proof of existence
• Finnish: ajattelen, siis olen — philosophical proof of existence
• French: je pense, donc je suis — philosophical proof of existence
• Galician: penso, logo existo — philosophical proof of existence
• Galician: penso, polo tanto, existo — philosophical proof of existence
• Georgian: ვაზროვნებ მაშასადამე ვარსებობ (vazrovneb mašasadame varsebob) — philosophical proof of existence
• German: ich denke, also bin ich — philosophical proof of existence
• Greek: σκέπτομαι, άρα υπάρχω (sképtomai, ára ypárcho) — philosophical proof of existence
• Gujarati: હું ચંતવું ક્રિવિ હું છું (hũ cantvũ krivi hũ chũ) — philosophical proof of existence
• Hebrew: אני חושב משמע אני קיים (aní ḥoshév, mashmá' aní qayám) — philosophical proof of existence
• Hindi: मैं सोचता हूँ इसलिए मैं हूँ (ma͠i soctā hū̃ islie ma͠i hū̃) — philosophical proof of existence
• Hindi: मैं सोचती हूँ इसलिए मैं हूँ (ma͠i soctī hū̃ islie ma͠i hū̃) — philosophical proof of existence
• Hungarian: gondolkodom, tehát vagyok — philosophical proof of existence
• Icelandic: ég hugsa, þess vegna er ég — philosophical proof of existence
• Indonesian: saya berpikir, maka saya ada — philosophical proof of existence
• Italian: penso dunque sono — philosophical proof of existence
• Japanese: 我思う、故に我在り (ware omou, yue ni ware ari) — philosophical proof of existence
• Khmer: ខ្ញុំគិតថា ហេតុដូច្នេះហើយខ្ញុំមាន (kɲom kɨt, haet doocneh haəy kɲom mien) — philosophical proof of existence
• Korean: 생각한다 고로 존재한다 (saenggakhanda goro jonjaehanda) — philosophical proof of existence
• Lao: ຂ້ອຍຄິດວ່າສະນັ້ນຂ້ອຍ (khǭi khit wā sa nan khǭi) — philosophical proof of existence
• Latin: cōgitō, ergō sum — philosophical proof of existence
• Lithuanian: mąstau, vadinasi, esu — philosophical proof of existence
• Macedonian: мислам, значи постојам (mislam, znači postojam) — philosophical proof of existence
• Marathi: मी विचार करतो त्याअर्थी मी आहे (mī vicār karto tyāarthī mī āhe) — philosophical proof of existence
• Eastern Mari: шонем, тугеже улам (šońem, tugeže ulam) — philosophical proof of existence
• Mongolian: би сэтгэж байгаа учраас оршиж байна (bi setgež bajgaa učraas oršiž bajna) — philosophical proof of existence
• Mongolian: ᠪᠢ ᠰᠡᠳᠭᠢᠵᠤ ᠪᠠᠶᠢᠭ᠎ᠠ ᠤᠴᠢᠷ ᠠᠴᠠ ᠣᠷᠤᠰᠢᠵᠤ ᠪᠠᠶᠢᠨ᠎ᠠ (bi sedɣiǰu bayiɣ-a učir-ača orusiǰu bayin-a) — philosophical proof of existence
• Navajo: ntséskees, áko, bee ʼáníshtʼé — philosophical proof of existence
• Norwegian Bokmål: jeg tenker, derfor er jeg — philosophical proof of existence
• Norwegian Nynorsk: eg tenkjer, derfor er eg — philosophical proof of existence
• Occitan: pensi, per consequéncia soi — philosophical proof of existence
• Old Church Slavonic: мꙑшлѭ оубо есмь (myšljǫ ubo esmĭ) — philosophical proof of existence
• Polish: myślę, więc jestem — philosophical proof of existence
• Portuguese: penso, logo existo — philosophical proof of existence
• Romanian: cuget, deci exist — philosophical proof of existence
• Russian: мы́слю, сле́довательно, существу́ю (mýslju, slédovatelʹno, suščestvúju) — philosophical proof of existence
• Russian: я мы́слю, сле́довательно, я есмь (ja mýslju, slédovatelʹno, ja jesmʹ) — philosophical proof of existence
• Sanskrit: अहं ध्यायाम्यतः अस्मि (ahaṃ dhyāyāmyataḥ asmi) — philosophical proof of existence
• Serbo-Croatian: мислим, дакле постојим — philosophical proof of existence
• Serbo-Croatian: мислим, дакле јесам — philosophical proof of existence
• Serbo-Croatian: mislim, dakle postojim — philosophical proof of existence
• Serbo-Croatian: mislim, dakle jesam — philosophical proof of existence
• Shona: ndinofunga, saka ndinorarama — philosophical proof of existence
• Slovak: myslím, teda som — philosophical proof of existence
• Slovene: mislim, torej sem — philosophical proof of existence
• Spanish: pienso, luego existo — philosophical proof of existence
• Swedish: jag tänker, alltså finns jag — philosophical proof of existence
• Tagalog: naiisip ko, samakatuwid ako ay iyon — philosophical proof of existence
• Telugu: నేను అనుకుంటున్నాను కలిపించారు (nēnu anukuṇṭunnānu kalipiñcāru) — philosophical proof of existence
• Thai: ฉันคิดว่าฉันเป็นดังนั้น — philosophical proof of existence
• Turkish: düşünüyorum, öyleyse varım — philosophical proof of existence
• Ukrainian: мислю, отже існую (myslju, otže isnuju) — philosophical proof of existence
• Ukrainian: я ми́слю, о́тже я є́сьм (ja mýslju, ótže ja jésʹm) — philosophical proof of existence
• Urdu: میں سوچتا ہوں اسلئے میں ہوں (ma͠i soctā hū̃ islie ma͠i hū̃) — philosophical proof of existence
• Urdu: میں سوچتی ہوں اسلئے میں ہوں (ma͠i soctī hū̃ islie ma͠i hū̃) — philosophical proof of existence
• Vietnamese: tôi tư duy, nên tôi tồn tại — philosophical proof of existence