translation: Add hindi translation guide.

Cleaned up by Akash Nimare.

docs/translating/hindi.md

@@ -0,0 +1,70 @@
+# Hindi translation style guide(हिन्दी अनुवाद शैली मार्गदर्शक)
+
+Use informal Hindi for translation:
+
+* Informal "you" (*तु*) instead of formal form *आप*. Many top software
+  companies (e.g. Google) use the informal one, because it's much more common in
+  the daily language and avoids making translations look like they were written
+  by machines.
+
+* Imperative, active, and continuous verbs, e.g. *manage streams* -
+  *चैनल प्रबंधित करें*, not *चैनल प्रबंधन*.
+
+* Warm and friendly phrasing whenever appropriate.
+
+* No slang or regional phrases that could be unclear or too informal.
+
+* Balance common verbs and nouns with specific IT-related translations
+  of English terms - this can be tricky, try to check how other
+  resources were translated (e.g. GMail, Microsoft websites, Facebook)
+  to decide what wouldn't sound awkward / rude in Hindi.
+
+Some terms are very tricky to translate, so be sure to communicate
+with other Hindi speakers in the community. It's all about making
+Zulip friendly and usable.
+
+## Terms(शर्तें)
+* Message - **संदेश**
+* Private message (PM) - **निजी संदेश**
+* Realm - **क्षेत्र**: the literal Hindi of realm is "राज्य",
+  which is not a term that's charged with computer
+  terminology. "क्षेत्र" is much clearer.
+* Stream - **धारा**: the use of the literal Hindi word for stream
+  "प्रवाह" is very confusing and not the correct metaphor for Hindi
+  speaking people. The correct term would be "धारा".
+* Topic - **विषय**
+* Private/invite-only stream - **निजी / केवल-आमंत्रण धारा**
+* Public stream - **सार्वजनिक धारा**
+* Bot - **बॉट**
+* Integration - **एकीकरण**
+* Notification - **अधिसूचना**
+* Alert word - **सतर्क शब्द**: this is only *alert*. Nonetheless, adding *word* may
+  make the term confusing (something like *danger!* could be a "चेतावनी के शब्द" as well).
+  Google Alerts uses "सतर्क शब्द" in its Hindi translation.
+* View - **राय**
+* Filter - **छानना**: as used with narrowing (see below).
+* Home - **मुख पृष्ठ**: we never use the term "घर" (literally home) in Hindi.
+* Emoji - **इमोजी**
+
+## Phrases (वाक्यांशों)
+* Subscribe/Unsubscribe to a stream - **एक धारा में सदस्यता लें/सदस्यता समाप्त करें**
+* Narrow to - **अकेले फ़िल्टर करें**: this is *filter only*, because there's no other
+  word that's common enough in Hindi for *to narrow*.
+* Mute/Unmute - **शांत/अशांत**
+* Deactivate/Reactivate - **निष्क्रिय करें / पुन: सक्रिय करें**
+* Search - **खोज करें/ढूंढे**
+* Pin - **ठीक करना**
+* Mention/@mention - **ज़िक्र करना / @ ज़िक्र करना**
+* Invalid - **अमान्य**
+* Customization - **अनुकूलन**
+* I want - **मुझे चाहिए**
+* User - **उपयोगकर्ता**
+* Person/People - **व्यक्ति/लोग**: "लोग" is the correct plural for
+  "व्यक्ति", but when talking of *लोग* referring to it as a crowd, we use
+  "भीड़" instead.
+
+## Others(अन्य)
+* You - **तु**: also "आप" if it's in plural.
+* We - **हम**
+* Message table - **संदेश बोर्ड**
+* Enter/Intro - **दर्ज / परिचय**

docs/translating/index.rst

@@ -9,6 +9,7 @@ Translating Zulip
    chinese
    french
    german
+   hindi
    polish
    russian
    spanish

docs/translating/translating.md

@@ -2,7 +2,7 @@
 
 To make Zulip even better for users around the world, the Zulip UI is
 being translated into a number of major languages, including Spanish,
-German, French, Chinese, Russian, and Japanese, with varying levels of
+German, Hindi, French, Chinese, Russian, and Japanese, with varying levels of
 progress. If you speak a language other than English, your help with
 translating Zulip would be greatly appreciated!
 
@@ -30,6 +30,7 @@ languages (e.g. what word to translate words like "home" to):
 * [Chinese](chinese.html)
 * [French](french.html)
 * [German](german.html)
+* [Hindi](hindi.html)
 * [Polish](polish.html)
 * [Russian](russian.html)
 * [Spanish](spanish.html)