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Do you understand the importance of language in your UI?
  v5.0 Posted at 12/10/2016 12:40 PM by Dennis Heer
The tone of your application speaks volumes about how users view it. Read this Google documentation on the voice of Android.
​Bad Example​Good Example
Keep text as short as possible. Avoid wordy, stilted text​.Consult the documentation that came with your phone for further instructions.​Read the instructions that came with your phone
Describe only what the user needs to know and don't provide unnecessary information.​Your phone needs to communicate with Google servers to sign in to your account. This may take up to five minutes.​Your phone is contacting Google. This can take up to 5 minutes.
​Focus on the user's concern, not technical detailsManually control GPS to prevent other apps from using it.​To save power, switch Location mode to Battery saving
​Put the most important thing first​77 other people +1’d this, including Larry PageLarry Page and 76 others +1’d this​
​Put the user's goal firstTouch Next to complete setup using a Wi-Fi connection​To finish setup using Wi-Fi, touch Next​
Avoid being confusing or annoying​​Sorry! Activity MyAppActivity (in application MyApp) is not responding.MyApp isn’t responding. Do you want to close it?​

Words to avoid

Don't use​​Use
​cannot, could not, do not, did not will not, you will​Contractions: can’t, couldn’t, don’t, didn’t, won’t, you’ll, and so on
​okay, ok​O​K
​please, sorry, thank youAttempts at politeness can annoy the user, especially in messages that say something has gone wrong. Exception: In Japanese, “please” is mandatory and imperative verbs should be localized accordingly (turn on -> please turn on).​
fail, failed, negative language​​In general, use positive phrasing (for example, “do” rather than “don’t,” except in cases such as “Don’t show again,” “Can’t connect,” and so on.)
me, I, my, mine​​you, your, yours
Are you sure? Warning!​Tell user the consequence instead, for example, "You’ll lose all photos and media"​

Formatting text

Use sentence-style capitalization for all UI strings.

Capitalize all important words in:

  • App names (Calendar, Google Drive)
  • Named features (Android Beam, Face Unlock)
  • Proper nouns (Statue of Liberty, San Francisco Giants)

Be conservative. Don't capitalize words that aren't part of a formal feature name: Sim card lock, Home screen, not Sim Card Lock, Home Screen.

Using Periods

Don't use a period after a single sentence or phrase used in isolation, such as in a toast, label, or notification. Wherever two or more sentences run together, use a period for each sentence.

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