Errors:
Attribute “xmlns:fb” not allowed here.
Attribute “ng-app” not allowed on element “html” at this point.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Element “link” is missing required attribute “href”.
Attribute “ng-controller” not allowed on element “body” at this point.
Attribute “language-btn” not allowed on element “a” at this point.
Element “transl” not allowed as child of element “small” in this context. (Suppressing further errors from this subtree.)
Attribute “ng-controller” not allowed on element “div” at this point.
Attribute “menuitemid” not allowed on element “li” at this point.
Bad value “” for attribute “id” on element “li”: An ID must not be the empty string.
Bad value “http://teachrussian.org/Materials/ByLevel/52ebf7ba1d2982b024a6268c8c7ea169/All?lang=en&filter=level|-1” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
Bad value “http://teachrussian.org/Materials/ByLevel/66a30fee6d5ce54d75b7d7beaf98e9eb/Novice?lang=en&filter=level|1” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
Bad value “http://teachrussian.org/Materials/ByLevel/7d892e234c6e90a88daa209d1fdad516/Intermediate?lang=en&filter=level|2” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
Bad value “http://teachrussian.org/Materials/ByLevel/be7b89fc6996807f1576f48b7d4f5e4d/Advanced?lang=en&filter=level|3” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
Bad value “http://teachrussian.org/Materials/ByLevel/5b6280c93c169d388dc901958e392790/Superior?lang=en&filter=level|4” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
Bad value “http://teachrussian.org/Materials/ByLevel/26439315cc1ffe4c3e8db3cf8a7b0043/Heritage?lang=en&filter=level|5” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
Bad value “http://teachrussian.org/Materials/ByLevel/e9a146aee6d4bc453df190a3c9ef6383/Children?lang=en&filter=level|6” for attribute “href” on element “a”: Illegal character in query: “|” is not allowed.
No “li” element in scope but a “li” end tag seen.
Duplicate ID “66a30fee6d5ce54d75b7d7beaf98e9eb”.
Attribute “menuitemicon” not allowed on element “li” at this point.
Attribute “deepness” not allowed on element “ul” at this point.
Duplicate ID “7d892e234c6e90a88daa209d1fdad516”.
Duplicate ID “be7b89fc6996807f1576f48b7d4f5e4d”.
Duplicate ID “5b6280c93c169d388dc901958e392790”.
Duplicate ID “26439315cc1ffe4c3e8db3cf8a7b0043”.
Duplicate ID “e9a146aee6d4bc453df190a3c9ef6383”.
Element “transl” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Attribute “transl” not allowed on element “input” at this point.
Attribute “keyword” not allowed on element “input” at this point.
Element “transl” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Attribute “spin” not allowed on element “section” at this point.
Attribute “for” not allowed on element “section” at this point.
Attribute “custombox” not allowed on element “div” at this point.
No “p” element in scope but a “p” end tag seen.
Element “transl” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
Attribute “tags-container” not allowed on element “div” at this point.
Element “transl” not allowed as child of element “p” in this context. (Suppressing further errors from this subtree.)
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “66a30fee6d5ce54d75b7d7beaf98e9eb” was here.
The first occurrence of ID “7d892e234c6e90a88daa209d1fdad516” was here.
The first occurrence of ID “be7b89fc6996807f1576f48b7d4f5e4d” was here.
The first occurrence of ID “5b6280c93c169d388dc901958e392790” was here.
The first occurrence of ID “26439315cc1ffe4c3e8db3cf8a7b0043” was here.
The first occurrence of ID “e9a146aee6d4bc453df190a3c9ef6383” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Empty heading.
The “contentinfo” role is unnecessary for element “footer”.