diff --git a/acme.sh b/acme.sh
index 0e3110a..28c39db 100755
--- a/acme.sh
+++ b/acme.sh
@@ -188,28 +188,28 @@ _dlg_versions() {
   if _exists "${ACME_OPENSSL_BIN:-openssl}"; then
     ${ACME_OPENSSL_BIN:-openssl} version 2>&1
   else
-    echo "$ACME_OPENSSL_BIN doesn't exists."
+    echo "$ACME_OPENSSL_BIN doesn't exist."
   fi
 
   echo "apache:"
   if [ "$_APACHECTL" ] && _exists "$_APACHECTL"; then
     $_APACHECTL -V 2>&1
   else
-    echo "apache doesn't exists."
+    echo "apache doesn't exist."
   fi
 
   echo "nginx:"
   if _exists "nginx"; then
     nginx -V 2>&1
   else
-    echo "nginx doesn't exists."
+    echo "nginx doesn't exist."
   fi
 
   echo "socat:"
   if _exists "socat"; then
     socat -V 2>&1
   else
-    _debug "socat doesn't exists."
+    _debug "socat doesn't exist."
   fi
 }
 
@@ -2801,10 +2801,10 @@ _setApache() {
 
   apacheVer="$($_APACHECTL -V | grep "Server version:" | cut -d : -f 2 | cut -d " " -f 2 | cut -d '/' -f 2)"
   _debug "apacheVer" "$apacheVer"
-  apacheMajer="$(echo "$apacheVer" | cut -d . -f 1)"
+  apacheMajor="$(echo "$apacheVer" | cut -d . -f 1)"
   apacheMinor="$(echo "$apacheVer" | cut -d . -f 2)"
 
-  if [ "$apacheVer" ] && [ "$apacheMajer$apacheMinor" -ge "24" ]; then
+  if [ "$apacheVer" ] && [ "$apacheMajor$apacheMinor" -ge "24" ]; then
     echo "
 Alias /.well-known/acme-challenge  $ACME_DIR
 
@@ -5519,7 +5519,7 @@ revoke() {
       fi
     fi
   else
-    _info "Domain key file doesn't exists."
+    _info "Domain key file doesn't exist."
   fi
 
   _info "Try account key."
diff --git a/deploy/kong.sh b/deploy/kong.sh
index d3a6bc4..1e1e310 100755
--- a/deploy/kong.sh
+++ b/deploy/kong.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env sh
-# If certificate already exist it will update only cert and key not touching other parameter
-# If certificate  doesn't exist it will only upload cert and key and not set other parameter
+# If certificate already exists it will update only cert and key, not touching other parameters
+# If certificate doesn't exist it will only upload cert and key, and not set other parameters
 # Note that we deploy full chain
 # Written by Geoffroi Genot <ggenot@voxbone.com>
 
diff --git a/dnsapi/dns_ali.sh b/dnsapi/dns_ali.sh
index 0c2365d..c210567 100755
--- a/dnsapi/dns_ali.sh
+++ b/dnsapi/dns_ali.sh
@@ -181,6 +181,7 @@ _describe_records_query() {
 
 _clean() {
   _check_exist_query "$_domain" "$_sub_domain"
+  # do not correct grammar here
   if ! _ali_rest "Check exist records" "ignore"; then
     return 1
   fi
diff --git a/dnsapi/dns_dgon.sh b/dnsapi/dns_dgon.sh
index c176afd..515e87d 100755
--- a/dnsapi/dns_dgon.sh
+++ b/dnsapi/dns_dgon.sh
@@ -22,7 +22,7 @@ dns_dgon_add() {
   txtvalue=$2
 
   DO_API_KEY="${DO_API_KEY:-$(_readaccountconf_mutable DO_API_KEY)}"
-  # Check if API Key Exist
+  # Check if API Key Exists
   if [ -z "$DO_API_KEY" ]; then
     DO_API_KEY=""
     _err "You did not specify DigitalOcean API key."
@@ -77,7 +77,7 @@ dns_dgon_rm() {
   txtvalue=$2
 
   DO_API_KEY="${DO_API_KEY:-$(_readaccountconf_mutable DO_API_KEY)}"
-  # Check if API Key Exist
+  # Check if API Key Exists
   if [ -z "$DO_API_KEY" ]; then
     DO_API_KEY=""
     _err "You did not specify DigitalOcean API key."
diff --git a/dnsapi/dns_duckdns.sh b/dnsapi/dns_duckdns.sh
index 711b81e..11b685c 100755
--- a/dnsapi/dns_duckdns.sh
+++ b/dnsapi/dns_duckdns.sh
@@ -91,13 +91,12 @@ dns_duckdns_rm() {
 
 ####################  Private functions below ##################################
 
-#fulldomain=_acme-challenge.domain.duckdns.org
-#returns
-# _duckdns_domain=domain
+# fulldomain may be 'domain.duckdns.org' (if using --domain-alias) or '_acme-challenge.domain.duckdns.org'
+# either way, return 'domain'. (duckdns does not allow further subdomains and restricts domains to [a-z0-9-].)
 _duckdns_get_domain() {
 
   # We'll extract the domain/username from full domain
-  _duckdns_domain="$(printf "%s" "$fulldomain" | _lower_case | _egrep_o '[.][^.][^.]*[.]duckdns.org' | cut -d . -f 2)"
+  _duckdns_domain="$(printf "%s" "$fulldomain" | _lower_case | _egrep_o '^(_acme-challenge\.)?[a-z0-9-]*\.duckdns\.org' | sed 's/^\(_acme-challenge\.\)\?\([a-z0-9-]*\)\.duckdns\.org/\2/')"
 
   if [ -z "$_duckdns_domain" ]; then
     _err "Error extracting the domain."
diff --git a/dnsapi/dns_dynv6.sh b/dnsapi/dns_dynv6.sh
index cf39282..819372c 100644
--- a/dnsapi/dns_dynv6.sh
+++ b/dnsapi/dns_dynv6.sh
@@ -18,7 +18,7 @@ dns_dynv6_add() {
   if ! _contains "$_your_hosts" "$_host"; then
     _debug "The host is $_host and the record $_record"
     _debug "Dynv6 returned $_your_hosts"
-    _err "The host $_host does not exists on your dynv6 account"
+    _err "The host $_host does not exist on your dynv6 account"
     return 1
   fi
   _debug "found host on your account"
@@ -49,7 +49,7 @@ dns_dynv6_rm() {
   if ! _contains "$_your_hosts" "$_host"; then
     _debug "The host is $_host and the record $_record"
     _debug "Dynv6 returned $_your_hosts"
-    _err "The host $_host does not exists on your dynv6 account"
+    _err "The host $_host does not exist on your dynv6 account"
     return 1
   fi
   _debug "found host on your account"
diff --git a/dnsapi/dns_gd.sh b/dnsapi/dns_gd.sh
index 7cf4738..7f8efca 100755
--- a/dnsapi/dns_gd.sh
+++ b/dnsapi/dns_gd.sh
@@ -91,7 +91,7 @@ dns_gd_rm() {
   fi
 
   if ! _contains "$response" "$txtvalue"; then
-    _info "The record is not existing, skip"
+    _info "The record does not exist, skip"
     return 0
   fi
 
diff --git a/dnsapi/dns_hetzner.sh b/dnsapi/dns_hetzner.sh
index d994d66..5db0418 100644
--- a/dnsapi/dns_hetzner.sh
+++ b/dnsapi/dns_hetzner.sh
@@ -155,7 +155,7 @@ _get_root() {
   if [ "$HETZNER_Zone_ID" ]; then
     _debug "Found, using: $HETZNER_Zone_ID"
     if ! _hetzner_rest GET "zones/${HETZNER_Zone_ID}"; then
-      _debug "Zone with id '$HETZNER_Zone_ID' not exists."
+      _debug "Zone with id '$HETZNER_Zone_ID' does not exist."
       _cleardomainconf "$domain_param_name"
       unset HETZNER_Zone_ID
     else
diff --git a/dnsapi/dns_hexonet.sh b/dnsapi/dns_hexonet.sh
index f150311..525efe7 100755
--- a/dnsapi/dns_hexonet.sh
+++ b/dnsapi/dns_hexonet.sh
@@ -42,7 +42,7 @@ dns_hexonet_add() {
   _debug _domain "$_domain"
 
   _debug "Getting txt records"
-  _hexonet_rest "&command=QueryDNSZoneRRList&dnszone=${h}.&RRTYPE=TXT"
+  _hexonet_rest "command=QueryDNSZoneRRList&dnszone=${h}.&RRTYPE=TXT"
 
   if ! _contains "$response" "CODE=200"; then
     _err "Error"
@@ -88,7 +88,7 @@ dns_hexonet_rm() {
   _debug _domain "$_domain"
 
   _debug "Getting txt records"
-  _hexonet_rest "&command=QueryDNSZoneRRList&dnszone=${h}.&RRTYPE=TXT&RR=${txtvalue}"
+  _hexonet_rest "command=QueryDNSZoneRRList&dnszone=${h}.&RRTYPE=TXT&RR=${_sub_domain}%20IN%20TXT%20\"${txtvalue}\""
 
   if ! _contains "$response" "CODE=200"; then
     _err "Error"
@@ -100,7 +100,7 @@ dns_hexonet_rm() {
   if [ "$count" = "0" ]; then
     _info "Don't need to remove."
   else
-    if ! _hexonet_rest "&command=UpdateDNSZone&dnszone=${_domain}.&delrr0='${_sub_domain}%20IN%20TXT%20\"${txtvalue}\""; then
+    if ! _hexonet_rest "command=UpdateDNSZone&dnszone=${_domain}.&delrr0=${_sub_domain}%20IN%20TXT%20\"${txtvalue}\""; then
       _err "Delete record error."
       return 1
     fi
@@ -126,7 +126,7 @@ _get_root() {
       return 1
     fi
 
-    if ! _hexonet_rest "&command=QueryDNSZoneRRList&dnszone=${h}."; then
+    if ! _hexonet_rest "command=QueryDNSZoneRRList&dnszone=${h}."; then
       return 1
     fi
 
diff --git a/dnsapi/dns_kinghost.sh b/dnsapi/dns_kinghost.sh
index 898ab28..6253c71 100644
--- a/dnsapi/dns_kinghost.sh
+++ b/dnsapi/dns_kinghost.sh
@@ -37,7 +37,7 @@ dns_kinghost_add() {
   _debug "Getting txt records"
   _kinghost_rest GET "dns" "name=$fulldomain&content=$txtvalue"
 
-  #This API call returns "status":"ok" if dns record does not exists
+  #This API call returns "status":"ok" if dns record does not exist
   #We are creating a new txt record here, so we expect the "ok" status
   if ! echo "$response" | grep '"status":"ok"' >/dev/null; then
     _err "Error"
diff --git a/dnsapi/dns_lexicon.sh b/dnsapi/dns_lexicon.sh
index 44bfa73..1970234 100755
--- a/dnsapi/dns_lexicon.sh
+++ b/dnsapi/dns_lexicon.sh
@@ -92,7 +92,7 @@ dns_lexicon_add() {
   _savedomainconf LEXICON_OPTS "$LEXICON_OPTS"
 
   # shellcheck disable=SC2086
-  $lexicon_cmd "$PROVIDER" $LEXICON_OPTS create "${domain}" TXT --name="_acme-challenge.${domain}." --content="${txtvalue}" --output QUIET 
+  $lexicon_cmd "$PROVIDER" $LEXICON_OPTS create "${domain}" TXT --name="_acme-challenge.${domain}." --content="${txtvalue}" --output QUIET
 
 }
 
diff --git a/dnsapi/dns_regru.sh b/dnsapi/dns_regru.sh
index 369f62a..b5729fd 100644
--- a/dnsapi/dns_regru.sh
+++ b/dnsapi/dns_regru.sh
@@ -5,7 +5,6 @@
 #
 # REGRU_API_Password="test"
 #
-_domain=$_domain
 
 REGRU_API_URL="https://api.reg.ru/api/regru2"
 
@@ -27,10 +26,17 @@ dns_regru_add() {
   _saveaccountconf_mutable REGRU_API_Username "$REGRU_API_Username"
   _saveaccountconf_mutable REGRU_API_Password "$REGRU_API_Password"
 
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _domain "$_domain"
+
   _info "Adding TXT record to ${fulldomain}"
-  response="$(_get "$REGRU_API_URL/zone/add_txt?input_data={%22username%22:%22${REGRU_API_Username}%22,%22password%22:%22${REGRU_API_Password}%22,%22domains%22:[{%22dname%22:%22${_domain}%22}],%22subdomain%22:%22_acme-challenge%22,%22text%22:%22${txtvalue}%22,%22output_content_type%22:%22plain%22}&input_format=json")"
+  _regru_rest POST "zone/add_txt" "input_data={%22username%22:%22${REGRU_API_Username}%22,%22password%22:%22${REGRU_API_Password}%22,%22domains%22:[{%22dname%22:%22${_domain}%22}],%22subdomain%22:%22_acme-challenge%22,%22text%22:%22${txtvalue}%22,%22output_content_type%22:%22plain%22}&input_format=json"
 
-  if _contains "${response}" 'success'; then
+  if ! _contains "${response}" 'error'; then
     return 0
   fi
   _err "Could not create resource record, check logs"
@@ -51,13 +57,64 @@ dns_regru_rm() {
     return 1
   fi
 
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _domain "$_domain"
+
   _info "Deleting resource record $fulldomain"
-  response="$(_get "$REGRU_API_URL/zone/remove_record?input_data={%22username%22:%22${REGRU_API_Username}%22,%22password%22:%22${REGRU_API_Password}%22,%22domains%22:[{%22dname%22:%22${_domain}%22}],%22subdomain%22:%22_acme-challenge%22,%22content%22:%22${txtvalue}%22,%22record_type%22:%22TXT%22,%22output_content_type%22:%22plain%22}&input_format=json")"
+  _regru_rest POST "zone/remove_record" "input_data={%22username%22:%22${REGRU_API_Username}%22,%22password%22:%22${REGRU_API_Password}%22,%22domains%22:[{%22dname%22:%22${_domain}%22}],%22subdomain%22:%22_acme-challenge%22,%22content%22:%22${txtvalue}%22,%22record_type%22:%22TXT%22,%22output_content_type%22:%22plain%22}&input_format=json"
 
-  if _contains "${response}" 'success'; then
+  if ! _contains "${response}" 'error'; then
     return 0
   fi
   _err "Could not delete resource record, check logs"
   _err "${response}"
   return 1
 }
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _domain=domain.com
+_get_root() {
+  domain=$1
+
+  _regru_rest POST "service/get_list" "username=${REGRU_API_Username}&password=${REGRU_API_Password}&output_format=xml&servtype=domain"
+  domains_list=$(echo "${response}" | grep dname | sed -r "s/.*dname=\"([^\"]+)\".*/\\1/g")
+
+  for ITEM in ${domains_list}; do
+    case "${domain}" in
+      *${ITEM}*)
+        _domain=${ITEM}
+        _debug _domain "${_domain}"
+        return 0
+        ;;
+    esac
+  done
+
+  return 1
+}
+
+#returns
+# response
+_regru_rest() {
+  m=$1
+  ep="$2"
+  data="$3"
+  _debug "$ep"
+
+  export _H1="Content-Type: application/x-www-form-urlencoded"
+
+  if [ "$m" != "GET" ]; then
+    _debug data "$data"
+    response="$(_post "$data" "$REGRU_API_URL/$ep" "" "$m")"
+  else
+    response="$(_get "$REGRU_API_URL/$ep?$data")"
+  fi
+
+  _debug response "${response}"
+  return 0
+}
diff --git a/dnsapi/dns_unoeuro.sh b/dnsapi/dns_unoeuro.sh
index c4593a6..13ba8a0 100644
--- a/dnsapi/dns_unoeuro.sh
+++ b/dnsapi/dns_unoeuro.sh
@@ -5,7 +5,7 @@
 #
 #UNO_User="UExxxxxx"
 
-Uno_Api="https://api.unoeuro.com/1"
+Uno_Api="https://api.simply.com/1"
 
 ########  Public functions #####################
 
@@ -24,12 +24,6 @@ dns_unoeuro_add() {
     return 1
   fi
 
-  if ! _contains "$UNO_User" "UE"; then
-    _err "It seems that the UNO_User=$UNO_User is not a valid username."
-    _err "Please check and retry."
-    return 1
-  fi
-
   #save the api key and email to the account conf file.
   _saveaccountconf_mutable UNO_Key "$UNO_Key"
   _saveaccountconf_mutable UNO_User "$UNO_User"