Fix minor typo in i18n string descriptions

Bug: #12
Change-Id: Ifdd3615b5920d3c1372d9548a1df755dbb81509b
diff --git a/src/_locales/en/messages.json b/src/_locales/en/messages.json
index 657b849..6366c58 100644
--- a/src/_locales/en/messages.json
+++ b/src/_locales/en/messages.json
@@ -51,7 +51,7 @@
 	},
 	"options_tabsoption_2": {
 		"message": "Open Google Translate in a unique tab and override the last translation instead of opening several tabs.",
-		"description": "Option which defines where should the translations be shown (in this case, each translation will be opened in the same tab used for the previous translation, or will open a new tab if there aren't any translations tabs open)."
+		"description": "Option which defines where should the translations be shown (in this case, each translation will be opened in the same tab used for the previous translation, or will open a new tab if there aren't any translation tabs open)."
 	},
 	"options_tabsoption_3": {
 		"message": "Open Google Translate in a panel (you need to activate <a href='chrome://flags/#enable-panels' id='panelsflag'>--enable-panels</a> flag). <sup style='color:red; font-weight: bold;'> EXPERIMENTAL</sup>",