it can happen - especially when distances are very great and Bishops visit rarely - that tightly ethnic parish structures effectively exclude enquirers from both non-Christian and heterodox backgrounds who do not speak any of the languages of the Orthodox parishes in their city.
A couple of things. First, this may only be an initial impression - my experience has been that a non-(insert ethnicity of choice here) speaking person who comes into a very (ethnic) parish may initially feel out of place due to the language, however, as he persists, the person is embraced by the parish despite the language issue. In know a number of Slavonic only parishes with large non-Russian American contingents in them who are active and an integral part of the parish life.
Here, in Australia, services in English are rare, and the mindset appears to be that Orthodoxy is for those who are already Orthodox,
In Australia, you might try the Russian parishes. Although the language of the service is generally Slavonic, the ruling bishop (Metropolitan Hilaron) is very missionary minded and encourages his clergy to be open to non-Russians and converts to the Faith.
Where does that leave the English-speaking enquirer who is drawn to Orthodoxy, perhaps from their reading, or the migrant from a non-Christian country such as China who is seeking a faith community?
Come to the parish, talk with the priest, introduce yourself to the people there - you may be surprised at how easily you become part of the parish community. If you are drawn to the Orthodox Church because you believe it is the One Holy Catholic and Apostolic Church, you won't let a little thing like language get in your way.
Fr David Moser