in my custom master page added Localizable property to false. Working absolutely fine. in office 365 SharePoint 2013 custom master page.
<SharePoint:ScriptLink ID="ScriptLink1" language="javascript" LoadAfterUI="True" name="sp.js" OnDemand="true" runat="server" Localizable="false" />
<SharePoint:ScriptLink ID="ScriptLink2" language="javascript" LoadAfterUI="True" name="sp.ribbon.js" OnDemand="true" runat="server" Localizable="false" />
<SharePoint:ScriptLink ID="ScriptLink3" language="javascript" LoadAfterUI="True" name="sp.runtime.js" OnDemand="true" runat="server" Localizable="false" />
<SharePoint:ScriptLink ID="ScriptLink4" language="javascript" LoadAfterUI="True" name="sp.core.js" OnDemand="true" runat="server" Localizable="false" />