allow some strings to be translated (#6428)

frontend/apps/cloudstorage/ftp.lua

@@ -52,9 +52,12 @@ function Ftp:downloadFile(item, address, user, pass, path, close)
 end
 
 function Ftp:config(item, callback)
-    local text_info = "FTP address must be in the format ftp://example.domain.com\n"..
-        "Also supported is format with IP e.g: ftp://10.10.10.1\n"..
-        "Username and password are optional."
+    local text_info = _([[
+The FTP address must be in the following format:
+ftp://example.domain.com
+An IP address is also supported, for example:
+ftp://10.10.10.1
+Username and password are optional.]])
     local hint_name = _("Your FTP name")
     local text_name = ""
     local hint_address = _("FTP address eg ftp://example.com")

frontend/apps/reader/modules/readerbookmark.lua

@@ -572,7 +572,8 @@ function ReaderBookmark:toggleBookmark(pn_or_xp)
         local notes = self.ui.toc:getTocTitleByPage(pn_or_xp)
         local chapter_name = notes
         if notes ~= "" then
-            notes = "in "..notes
+            -- @translators In which chapter title (%1) a note is found.
+            notes = T(_("in %1"), notes)
         end
         self:addBookmark({
             page = pn_or_xp,

frontend/ui/elements/common_settings_menu_table.lua

@@ -409,7 +409,7 @@ common_settings.document = {
                 local interval = G_reader_settings:readSetting("auto_save_settings_interval_minutes")
                 local s_interval
                 if interval == false then
-                    s_interval = "only on close"
+                    s_interval = _("only on close")
                 else
                     s_interval = T(N_("every 1 m", "every %1 m", interval), interval)
                 end