I tested the rule and it seems to trigger with and without quotes. It looks better with quotes 
.
I also added Expire command to reset the string after its been updated. It not necessary but helps when checking if the string was actually updated in Sitemap.
String OutsideNorthLights_Command "Outside north light command" (OutsideNorthLights) {alexa="ModeController.mode" [supportedModes="ON=ON,OFF=OFF,CONSTANT=CONSTANT", autoupdate="false"], expire="4h,command=NORMAL"}
Changed the friendly name to
friendlyNames="@DeviceName.Shade"
And it still behaves the same [for french]: accepting “raise/lower” but rejecting “open/close” 
really strange. In Italian open/close/raise/lower work if I identify the rollershutter with the exact label, like “alexa, open the bedroom rollershutter”. But if I want to leverage room awareness, saying “alexa, open the rollershutter” when I’m in the same room of the echodot, only raise/lower work fine, open/close don’t work. 
I opened a case with the Alexa developer support team. Let’s see what they come back with.
Seems the ON and OFF commands in german won‘t work as well.
Assuming you are referring to your original post below, I have responded to it.
@wawa79 So while answering a similar question for the Spanish language, I was able to get it working for the French language as well. It appears that you have to formulate the request a certain way.
If you label your item as Salon Volet, the below utterances are working.
Rollershutter AX_DW_mRDC_Salon_volettest "Salon Volet" {alexa="RangeController.rangeValue" [category="EXTERIOR_BLIND", supportedRange="0:100:10", unitOfMeasure="Percent", actionMappings="Close=0,Open=100,Lower=(-10),Raise=(+10)", stateMappings="Closed=0,Open=1:100"]}
“Alexa, ouvre le volet du salon”
“Alexa, ferme le volet du salon”
Hi @jeshab,
I’m struggling for hours … I wonder if there is not a bug with Alexa.
I exactly tried your item definition and phrases, but i got the message l'appareil salon volet ne prend pas en charge cette commande
I have deployed my own Lambda instance to debug, and it seems that the device descriptor is totally ignored by Alexa…
{
"endpointId": "AX_DW_mRDC_Salon_volettest",
"manufacturerName": "openHAB",
"friendlyName": "Salon Volet",
"description": "Rollershutter AX_DW_mRDC_Salon_volettest via openHAB",
"displayCategories": [
"EXTERIOR_BLIND"
],
"cookie": {
"propertyMap": "{\"RangeController:AX_DW_mRDC_Salon_volettest\":{\"rangeValue\":{\"parameters\":{\"supportedRange\":{\"minimumValue\":0,\"maximumValue\":100,\"precision\":10},\"actionMappings\":[{\"name\":\"Close\",\"directive\":{\"name\":\"SetRangeValue\",\"payload\":{\"rangeValue\":0}}},{\"name\":\"Open\",\"directive\":{\"name\":\"SetRangeValue\",\"payload\":{\"rangeValue\":100}}},{\"name\":\"Lower\",\"directive\":{\"name\":\"AdjustRangeValue\",\"payload\":{\"rangeValueDelta\":-10,\"rangeValueDeltaDefault\":false}}},{\"name\":\"Raise\",\"directive\":{\"name\":\"AdjustRangeValue\",\"payload\":{\"rangeValueDelta\":10,\"rangeValueDeltaDefault\":false}}}],\"unitOfMeasure\":\"Percent\",\"category\":\"EXTERIOR_BLIND\",\"stateMappings\":[{\"name\":\"Closed\",\"value\":0},{\"name\":\"Open\",\"range\":{\"minimumValue\":1,\"maximumValue\":100}}],\"friendlyNames\":[\"Salon Volet\"]},\"item\":{\"name\":\"AX_DW_mRDC_Salon_volettest\",\"type\":\"Rollershutter\"},\"schema\":{\"name\":\"rangeValue\"}}}}"
},
"capabilities": [
{
"type": "AlexaInterface",
"interface": "Alexa",
"version": "3"
},
{
"type": "AlexaInterface",
"interface": "Alexa.RangeController",
"version": "3",
"instance": "AX_DW_mRDC_Salon_volettest",
"capabilityResources": {
"friendlyNames": [
{
"@type": "text",
"value": {
"text": "Salon Volet",
"locale": "en-AU"
}
},
{
"@type": "text",
"value": {
"text": "Salon Volet",
"locale": "en-CA"
}
},
{
"@type": "text",
"value": {
"text": "Salon Volet",
"locale": "en-GB"
}
},
{
"@type": "text",
"value": {
"text": "Salon Volet",
"locale": "en-IN"
}
},
{
"@type": "text",
"value": {
"text": "Salon Volet",
"locale": "en-US"
}
}
]
},
"properties": {
"supported": [
{
"name": "rangeValue"
}
],
"proactivelyReported": false,
"retrievable": true,
"nonControllable": false
},
"configuration": {
"supportedRange": {
"minimumValue": 0,
"maximumValue": 100,
"precision": 10
},
"unitOfMeasure": "Alexa.Unit.Percent"
},
"semantics": {
"actionMappings": [
{
"@type": "ActionsToDirective",
"actions": [
"Alexa.Actions.Close"
],
"directive": {
"name": "SetRangeValue",
"payload": {
"rangeValue": 0
}
}
},
{
"@type": "ActionsToDirective",
"actions": [
"Alexa.Actions.Open"
],
"directive": {
"name": "SetRangeValue",
"payload": {
"rangeValue": 100
}
}
},
{
"@type": "ActionsToDirective",
"actions": [
"Alexa.Actions.Lower"
],
"directive": {
"name": "AdjustRangeValue",
"payload": {
"rangeValueDelta": -10,
"rangeValueDeltaDefault": false
}
}
},
{
"@type": "ActionsToDirective",
"actions": [
"Alexa.Actions.Raise"
],
"directive": {
"name": "AdjustRangeValue",
"payload": {
"rangeValueDelta": 10,
"rangeValueDeltaDefault": false
}
}
}
],
"stateMappings": [
{
"@type": "StatesToValue",
"states": [
"Alexa.States.Closed"
],
"value": 0
},
{
"@type": "StatesToRange",
"states": [
"Alexa.States.Open"
],
"range": {
"minimumValue": 1,
"maximumValue": 100
}
}
]
}
},
{
"type": "AlexaInterface",
"interface": "Alexa.EndpointHealth",
"version": "3",
"properties": {
"supported": [
{
"name": "connectivity"
}
],
"proactivelyReported": false,
"retrievable": true
}
}
]
}
Your regional settings are not setup properly on your server. If you look at the friendly names text-based locales, there are in English which is the default setting.
I changed it - but unfortunately not working better. Did you manage to have your shutters working fine with Alexa ?
Have you triggered an Alexa discovery after making the change? If so, try to delete your existing device and re-run the discovery. What utterances are you using based on your voice history?
As long as you are using the same exact item definition and utterances I mentioned above, it will work.
When I was testing I found Alexa can sometimes be very picky with words and pronunciation, especially if there are other similar sounding items. One tip for testing is to use item words that are very different from everything else and easy to say. Also, as Jeremy says, you can check Alexa history to see if the words were heard correctly.
@jeshab: Just tested your item and it still does not work for me :
Me : "Alexa, ouvre le volet du salon" (checked that Alexa actually understood it weel)
Alexa : "L'appareil volet salon ne prend pas en charge cette commande"
Very surprising that identical declaration/sentence does not behave the same on my end.
Same here… Driving me crazy. I have cleared all Alexa history, cache… etc.
Surprizingly, I have just enabled Homekit tags [ "WindowCovering" ] and it enabled only basic feature : the “lower” (baisse) and “raise” (monte), which does +10 / -10. Open and Close won’t work.
Not sure what to recommend at this point. Assuming it might be an issue with the Alexa simulator, I just switched one of my echo device to French (France), requested the same commands by voice and it still worked for me. I even added a light device called “Salon” to see if it create some conflict and still no problem controlling the two devices. The only difference I can see at this point would be the Amazon account country setting. Anyway, if we can’t get it solve, the support ticket I opened with the Alexa developer support team was escalated and I am waiting on a response.
In meantime, you can just define the raise/lower semantic actions to the open/close value, that you could have your blind open/close when requesting monte or baisse.
Since you have deployed your own skill, could you try to use the Alexa simulator, accessible through your Alexa Developer Console (under Test tab), and see if you get the same result? Make sure to use the same item definition I listed above.
The skill supports the Homekit tags. So you basically modeled your item as a Blind metadata label, which translates to the same item definition listed above.
I just got the update below on that support ticket. It seems like a capability overlapping issue on the Alexa side.
“I don’t have any news to share from the internal engineering team. However, in my research I found that this might be a known issue on our end stemming from the fact that evidently, it is acceptable in French to use “ouvre” or “ferme” in the context of turning a light bulb on or off as well. For example, “ouvre la lumière.” I’ll let you know once I have more information or confirmation from our engineers.”
@hairdresser Any chance you could do the testing I mentioned above? I would like to know if you get the same result than I did. Thanks!
Item
(Appended language parameter to force French language on that item for testing consistency)
Rollershutter AX_DW_mRDC_Salon_volettest "Salon Volet" {alexa="RangeController.rangeValue" [category="EXTERIOR_BLIND", supportedRange="0:100:10", unitOfMeasure="Percent", actionMappings="Close=0,Open=100,Lower=(-10),Raise=(+10)", stateMappings="Closed=0,Open=1:100", language="fr"]}
Simulator
(Brief mode is enabled on my account; that’s why there is an “Audio only response” on acknowledgement)
Events
2019-12-30 21:15:39.167 [ome.event.ItemCommandEvent] - Item 'AX_DW_mRDC_Salon_volettest' received command 100
2019-12-30 21:15:39.168 [vent.ItemStateChangedEvent] - AX_DW_mRDC_Salon_volettest changed from NULL to 100
2019-12-30 21:15:45.641 [ome.event.ItemCommandEvent] - Item 'AX_DW_mRDC_Salon_volettest' received command 0
2019-12-30 21:15:45.642 [vent.ItemStateChangedEvent] - AX_DW_mRDC_Salon_volettest changed from 100 to 0
2019-12-30 21:15:55.502 [ome.event.ItemCommandEvent] - Item 'AX_DW_mRDC_Salon_volettest' received command 100
2019-12-30 21:15:55.502 [vent.ItemStateChangedEvent] - AX_DW_mRDC_Salon_volettest changed from 0 to 100
2019-12-30 21:16:05.014 [ome.event.ItemCommandEvent] - Item 'AX_DW_mRDC_Salon_volettest' received command 0
2019-12-30 21:16:05.015 [vent.ItemStateChangedEvent] - AX_DW_mRDC_Salon_volettest changed from 100 to 0
How do you tell alexa to activate the stop mode?
I have configured it like you, in the alexa app I see the mode stop, up and down. I can select it and I see the change in the openhab log. But I am not able to tell alexa to do so 
Edit:
Now I got it 
Your example is an english one. In my case alexa understand “stopp” (german) and your example uses stop.
For all german ones, here my setup + commands:
Group gEins "eins" {alexa="Endpoint.EXTERIOR_BLIND"}
String Rollo_WZ_klein_stopp "halt" (gEins) {alexa="ModeController.mode" [supportedModes="STOP=stopp,UP=auf,DOWN=zu", autoupdate="false"]}
Rollershutter Rollo_WZ_klein "eins Rollo" (gEins) {alexa="RangeController.rangeValue" [category="EXTERIOR_BLIND", friendlyNames="@Setting.Opening",
supportedRange="0:100:10", unitOfMeasure="Percent", actionMappings="Close=100,Open=0,Lower=(+10),Raise=(-10)",
stateMappings="Closed=100,Open=0:100"],channel="loxone:miniserver:.." }
For setting modes (mode controller item) you need to say it like this: ‘Set item name to STOP’.
If you want to say it like: ‘STOP item name’, then you need to create an Alexa routine for that phrase.