Set up localization

Gemfile.lock

@@ -26,16 +26,29 @@ GEM
     concurrent-ruby (1.3.5)
     connection_pool (2.5.0)
     drb (2.2.1)
+    erubi (1.13.1)
+    forwardable (1.3.3)
+    gettext (3.5.1)
+      erubi
+      locale (>= 2.0.5)
+      prime
+      racc
+      text (>= 1.3.0)
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
+    locale (2.1.4)
     logger (1.6.6)
     mini_portile2 (2.8.8)
     minitest (5.25.5)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.7.4)
+    prime (0.1.3)
+      forwardable
+      singleton
     puma (6.6.0)
       nio4r (~> 2.0)
+    racc (1.8.1)
     rack (3.1.12)
     rack-protection (4.1.1)
       base64 (>= 0.1.0)
@@ -59,10 +72,12 @@ GEM
     sinatra-activerecord (2.0.28)
       activerecord (>= 4.1)
       sinatra (>= 1.0)
+    singleton (0.3.0)
     sqlite3 (2.6.0)
       mini_portile2 (~> 2.8.0)
     sqlite3 (2.6.0-arm64-darwin)
     sqlite3 (2.6.0-x86_64-darwin)
+    text (1.3.1)
     tilt (2.6.0)
     timeout (0.4.3)
     tzinfo (2.0.6)
@@ -76,6 +91,7 @@ PLATFORMS
 
 DEPENDENCIES
   bcrypt
+  gettext
   puma
   rackup
   rake