Updating i18n files from Crowdin

Also, updating blocked-users.txt.

Change-Id: Idfa3f519095f2a773d948854f1a9e23b2e1aeef4
diff --git a/tools/i18n/blocked-users.txt b/tools/i18n/blocked-users.txt
index 0c09010..052e6f5 100644
--- a/tools/i18n/blocked-users.txt
+++ b/tools/i18n/blocked-users.txt
@@ -17,6 +17,13 @@
 bsiwanon
 nlmyst-35
 
+# These users joined the project and submitted translations, but all of them
+# are incorrect (e.g. they were submitted to the wrong language).
+# We block them so they aren't listed with the wrong language.
+# NOTE: Once their translations have been cleaned/moved, each translator should
+# be removed from this list.
+mikkosaarinentapani
+
 # This is the extension creator, so he shouldn't be credited as a translator
 # neither.
 avm99963