Sek" means "yes" in Dothraki.

Him with speeches fair / and sweet allurements doth the queen detain; / but Juno's hospitality I fear; / scarce at an hour like this will she her hand forbear."

Full fast the rumour 'mong the people wrought; / cold horror chills us, and aghast we stand; / whom doth Apollo claim, whose death the Fates demand?"

O son, what mean / these transports? Say, what bitter grief doth move / thy soul to rage untamed? Where vanished is thy love?"

And they answered: Why doth our lord speak so, as though thy servants had committed so heinous a fact?

Vos" means "no" in Dothraki.

In a far retreat / there lies a haven; towards the deep doth stand / an island, on whose jutting headlands beat / the broken billows, shivered into sleet.

Whate'er the maiden on those leaves doth trace, / in rows she sorts, and in the cave doth store."

Then first with eager joy / "O Goddess-born," the bold Achates cries, / "how now? What purpose doth thy mind devise? / Lo! all are safe – ships, comrades brought again; / one only fails us, who before our eyes / sank in the midst of the engulfing main. / All else confirms the tale thy mother told thee plain."

“Why do you not write?” “Because it doth not please me.”