i18n is changing the output of Ajax call - ajax

Question

I have a datepicker function that was working pefectly well until I internationalized my application. But now, it's not working anymore. Here is my Ajax function :
$datepicker.change(function(){
currentDate = $datepicker.datepicker( "getDate" );
dateString = $.datepicker.formatDate("yy-mm-dd", currentDate);
console.log("My dateString is: "+dateString);
Here my console is showing the right date
$.ajax({
type: "POST",
url: "movements/getTO/",
data: {"date":dateString},
}).done(function(data) {
$("#resultTO").html(data[0])
$("#resultQty").html(data[1])
});
});
with this controller function :
def getTO
selected_date = Date.parse(params[:date])
new_html_to_return1 = Movement.where(:movement_date =>selected_date, :user => current_user.email).sum("turnover")
new_html_to_return2 = Movement.where(:movement_date =>selected_date, :user => current_user.email).sum("quantity")
#table = [new_html_to_return1, new_html_to_return2]
render :json => #table
end
My routes.rb :
post "movements/getTO"
scope ":locale", locale: /#{I18n.available_locales.join("|")}/ do
resources :movements
(...)
end
match '*path', to: redirect("/#{I18n.default_locale}/%{path}"), constraints: lambda { |req| !req.path.starts_with? "/#{I18n.default_locale}/" }
match '', to: redirect("/#{I18n.default_locale}")
At this point, my datepicker was having a route trouble. So I added in routes.rb
match 'movements/getTO', to: redirect("movements/getTO")
But that's not right because now I have as output : < and !. Incredible for sums isn't it ???