I couldn’f find any direct reference to “tongues” in the Cateshism. However I did find a number of articles related to “catholic tongues” on the net. For ease of use I looked upt the Wikipedia article and cut and pasted the following, in relatio to the church’s official support of otherwise on the Charismatic Renewal, which intrinsically includes “speaking or praying in tongues”. In this usage of course “speaking” is “praying”, which is no different from “speaking” the “Our Father” or “Lord’s Prayer” in good old English or whatever our local lingo is. We’re speaking and praying then as well. No difference.
From Wikipedia -
*"Reaction from the Church hierarchy (to Catholic Charismatic Renewal)
Pope John Paul II
The initial reaction to the movement by the Church hierarchy was cautiously supportive. Some initially supported it as being a harbinger of ecumenism (greater unity of Gospel witness among the different Christian traditions). It was thought that these practices would draw the Catholic Church and Protestant communities closer together in a truly spiritual ecumenism. Today, the Catholic Charismatic Renewal enjoys the strong support of the hierarchy, from the Pope to bishops of dioceses around the world, as an officially recognized ecclesial movement.
Three popes have acknowledged the movement: Pope Paul VI , Pope John Paul II and Benedict XVI. Pope John Paul II stated that the movement was integral to the renewal of the entire Catholic Church. Pope John Paul II (as well as then Cardinal Ratzinger, now Pope Benedict XVI) acknowledged good aspects of the movement while urging caution, pointing out members must maintain their link to the Catholic Church.
Pope John Paul II, in particular, made a number of statements on the movement. On November 30, 1990, The Pontifical Council for the Laity promulgated the decree which inaugurated the Catholic Fraternity of Covenant Communities and Fellowships. Brian Smith of Brisbane, elected President of the Executive of the Fraternity, called the declaration the most significant event in the history of the charismatic renewal since the 1975 Holy Year international conference and the acknowledgment it received from Pope Paul VI at that time, saying ‘It is the first time that the Renewal has had formal, canonical recognition by the Vatican.’ 
In March 1992, Pope John Paul II stated
At this moment in the Church's history, the Charismatic Renewal can play a significant role in promoting the much-needed defense of Christian life in societies where secularism and materialism have weakened many people's ability to respond to the Spirit and to discern God's loving call. Your contribution to the re-evangelization of society will be made in the first place by personal witness to the indwelling Spirit and by showing forth His presence through works of holiness and solidarity.
Moreover, during Pentecost 1998, the Pope recognized the essential nature of the charismatic dimension:
“The institutional and charismatic aspects are co-essential as it were to the Church’s constitution. They contribute, although differently, to the life, renewal and sanctification of God’s People. It is from this providential rediscovery of the Church’s charismatic dimension that, before and after the Council, a remarkable pattern of growth has been established for ecclesial movements and new communities.”
The Papal Preacher, Rev. Fr. Raniero Cantalamessa, has written on the topic numerous times since 1986.
Pope Benedict XVI affirmed the Charismatic Renewal during 2008."*