css
/* Change the title */
.bpModalDialogTitleText {
    visibility: hidden;
    position: relative;
}
.bpModalDialogTitleText:after {
    visibility: visible;
    position: absolute;
    top: 0;
    left: 0;
    content: "Starta ny konversation";
}

/* Change "Start a new conversation?" */
.bpModalDialogNewConversationText {
    visibility: hidden;
    position: relative;
}
.bpModalDialogNewConversationText:after {
    visibility: visible;
    position: absolute;
    top: 0;
    left: 0;
    content: "Är du säker på att du vill starta en ny konversation?";
}

/* Change the button text */
.bpModalDialogNewConversationButton {
    color: transparent;
    position: relative;
}
.bpModalDialogNewConversationButton:after {
    visibility: visible;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    content: "Starta om";
    color: initial;
    white-space: nowrap;
}


/* Change the today text */
div.bpMessageContainer[data-direction="system"] > p.bpMessageBlocksTextText {
  visibility: hidden !important;
  position: relative !important;
}

div.bpMessageContainer[data-direction="system"] > p.bpMessageBlocksTextText::before {
  content: "Idag" !important;
  visibility: visible !important;
  position: absolute !important;
  top: 0;
  left: 0;
  white-space: nowrap;
}