Localizations for most server-side strings

Gemfile.lock

@@ -103,6 +103,10 @@ GEM
     dotenv-rails (2.1.1)
       dotenv (= 2.1.1)
       railties (>= 4.0, < 5.1)
+    easy_translate (0.5.0)
+      json
+      thread
+      thread_safe
     erubis (2.7.0)
     excon (0.53.0)
     execjs (2.7.0)
@@ -129,6 +133,7 @@ GEM
       hamlit (>= 1.2.0)
       railties (>= 4.0.1)
     hashdiff (0.3.0)
+    highline (1.7.8)
     hiredis (0.6.1)
     htmlentities (4.3.4)
     http (2.0.3)
@@ -143,6 +148,16 @@ GEM
     httplog (0.3.2)
       colorize
     i18n (0.7.0)
+    i18n-tasks (0.9.6)
+      activesupport (>= 4.0.2)
+      ast (>= 2.1.0)
+      easy_translate (>= 0.5.0)
+      erubis
+      highline (>= 1.7.3)
+      i18n
+      parser (>= 2.2.3.0)
+      term-ansicolor (>= 1.3.2)
+      terminal-table (>= 1.5.1)
     jbuilder (2.6.0)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
@@ -352,9 +367,15 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     temple (0.7.7)
+    term-ansicolor (1.4.0)
+      tins (~> 1.0)
+    terminal-table (1.7.0)
+      unicode-display_width (~> 1.1)
     thor (0.19.1)
+    thread (0.2.2)
     thread_safe (0.3.5)
     tilt (2.0.5)
+    tins (1.12.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     uglifier (3.0.1)
@@ -401,6 +422,7 @@ DEPENDENCIES
   htmlentities
   http
   httplog
+  i18n-tasks (~> 0.9.6)
   jbuilder (~> 2.0)
   jquery-rails
   ledermann-rails-settings