Can you share some code with us?

<div>
    <div class="epi-gadgetInnerToolbar" data-dojo-attach-point="toolbar">        
        <button data-dojo-type="dijit/form/Button" 
                data-dojo-attach-point="norwegian" 
                data-dojo-props="intermediateChanges:true">Norsk</button>
        <button data-dojo-type="dijit/form/Button" 
                data-dojo-attach-point="english" 
                data-dojo-props="intermediateChanges:true">Engelsk</button>
        <button data-dojo-type="dijit/form/Button" 
                data-dojo-attach-point="dual" 
                data-dojo-props="intermediateChanges:true" title="" >Begge språk</button>
    </div>
    <div>
        <input type="text" data-dojo-attach-point="Mail" style="margin-left: 10px; margin-right: 5px;"/>
        <button data-dojo-type="dijit/form/Button" 
            data-dojo-attach-point="test" 
            data-dojo-props="intermediateChanges:true">Send test mail</button>
    </div>
    <div>
        <textarea rows="2" readonly="true" data-dojo-attach-point="Content" style="width: 100%; height: 100px"></textarea>
    </div>
    <div style="display: none" data-dojo-type="epi-cms/component/ContentQueryGrid" data-dojo-attach-point="contentQuery" />
    
</div>

define([
    "dojo/_base/declare",
    "dojo/dom-geometry",
    "dijit/_TemplatedMixin",
    "dijit/_Container",
    "dijit/layout/_LayoutWidget",
    "dijit/_WidgetsInTemplateMixin",

    "epi-cms/component/ContentQueryGrid",
    "dojo/text!./CustomSearch.html"],
    function (// Dojo        
        declare,
        domGeometry,
    // Dijit    
        _TemplatedMixin,
        _Container,
        _LayoutWidget,
        _WidgetsInTemplateMixin,
    // EPi CMS    
        ContentQueryGrid,
        template) {
        return declare([
            _Container,
            _LayoutWidget,
            _TemplatedMixin,
            _WidgetsInTemplateMixin
        ],
        {
            templateString: template,
            postCreate: function() {
                this.connect(this.norwegian, "onClick", this._NorwegianQuery);
                this.connect(this.english, "onClick", this._EnglishQuery);
                this.connect(this.dual, "onClick", this._DualQuery);
                this.connect(this.test, "onClick", this._TestQuery);
            },
            resize: function(newSize) {
                this.inherited(arguments);
                var toolbarSize = domGeometry.getMarginBox(this.toolbar);
                var gridSize = { w: newSize.w, h: newSize.h - toolbarSize.h };
                this.contentQuery.resize(gridSize);
            },

            _NorwegianQuery: function() {
                var contextService = epi.dependency.resolve("epi.shell.ContextService");
                var currentContext = contextService.currentContext;
                this.contentQuery.set("queryParameters", { queryText: "no", CurrentPage: currentContext.id });
                this.contentQuery.set("queryName", "CustomQuery");
                this.Content.value = "Mail sendt til norske abonnenter for siden " + currentContext.name;
                this.disconnect(this.norwegian, "onClick", this._NorwegianQuery);
            },

            _EnglishQuery: function() {
                var contextService = epi.dependency.resolve("epi.shell.ContextService");
                var currentContext = contextService.currentContext;
                this.contentQuery.set("queryParameters", { queryText: "en", CurrentPage: currentContext.id });
                this.contentQuery.set("queryName", "CustomQuery");
                this.Content.value = "Mail sendt til engelske abonnenter for siden " + currentContext.name;
            },

            _DualQuery: function() {
                var contextService = epi.dependency.resolve("epi.shell.ContextService");
                var currentContext = contextService.currentContext;
                this.contentQuery.set("queryParameters", { queryText: "dual", CurrentPage: currentContext.id });
                this.contentQuery.set("queryName", "CustomQuery");
                this.Content.value = "Mail sendt til alle abonnenter for siden " + currentContext.name;
            },

            _TestQuery: function() {
                var mail = this.Mail.value;
                var contextService = epi.dependency.resolve("epi.shell.ContextService");
                var currentContext = contextService.currentContext;
                this.contentQuery.set("queryParameters", { queryText: "test", CurrentPage: currentContext.id, Mail: mail });
                this.contentQuery.set("queryName", "CustomQuery");
                this.Content.value = "Test mail sendt til " + mail + " for siden " + currentContext.name + " på engelsk og norsk";
            },
            contextChanged: function(context, callerData) {
                alert("context change " + context.name);
            }
    });
    });

The service  that picks up the event works fine :)

I posted the post on the wrong username :)

I do not care about the context change, but I tried to test to see if it was that part that fucked up the code.
I am new to dijit/dojo, and pieced this togthere from stuff I found on the internet.

I am not 100% shore but I would try to remove intermediateChanges:true from the button element, can't really see why you need the button to be auto updated with that property. I am no DOJO expert, but it is worth a try ;-)

good luck!